diff --git a/projects/packages/sync/changelog/fix-phan-issues_in_old_woo b/projects/packages/sync/changelog/fix-phan-issues_in_old_woo
new file mode 100644
index 0000000000000..a08476d53b87e
--- /dev/null
+++ b/projects/packages/sync/changelog/fix-phan-issues_in_old_woo
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Improve compatibility with old WooCommerce versions.
diff --git a/projects/packages/sync/src/modules/class-woocommerce-products.php b/projects/packages/sync/src/modules/class-woocommerce-products.php
index df01192797d28..68d365e65ae52 100644
--- a/projects/packages/sync/src/modules/class-woocommerce-products.php
+++ b/projects/packages/sync/src/modules/class-woocommerce-products.php
@@ -7,7 +7,6 @@
 
 namespace Automattic\Jetpack\Sync\Modules;
 
-use Automattic\WooCommerce\Enums\ProductType;
 use DateTimeZone;
 use WC_DateTime;
 use WP_Error;
@@ -292,10 +291,12 @@ public function get_product_by_ids( $ids, $order = '' ) {
 			);
 
 			$post_type = $post->post_type;
+			// ProductType::VARIATION and ProductType::SIMPLE have only existed since WooCommerce 9.7, so
+			// we can't rely on that existing, but using the strings is probably safe enough.
 			if ( 'product_variation' === $post_type ) {
-				$product_type = ProductType::VARIATION;
+				$product_type = 'variation';
 			} elseif ( 'product' === $post_type ) {
-				$product_type = $product_types[ $post->ID ] ?? ProductType::SIMPLE;
+				$product_type = $product_types[ $post->ID ] ?? 'simple';
 			} else {
 				$product_type = null;
 			}
@@ -444,6 +445,7 @@ private function get_product_posts( $ids, $order = '' ) {
 	 * @return array
 	 */
 	private function get_product_cogs_data( $ids, $order = '' ) {
+		// @phan-suppress-current-line UnusedPluginSuppression @phan-suppress-next-line PhanUndeclaredClassMethod -- we're checking for the class (around since WooCommerce 7.1) before calling the method (introduced as part of the original class). See also: https://github.com/phan/phan/issues/1204
 		$is_cogs_enabled = class_exists( '\Automattic\WooCommerce\Utilities\FeaturesUtil' ) && \Automattic\WooCommerce\Utilities\FeaturesUtil::feature_is_enabled( 'cost_of_goods_sold' );
 
 		if ( ! $is_cogs_enabled ) {
diff --git a/projects/packages/woocommerce-analytics/changelog/fix-phan-issues_in_old_woo b/projects/packages/woocommerce-analytics/changelog/fix-phan-issues_in_old_woo
new file mode 100644
index 0000000000000..a08476d53b87e
--- /dev/null
+++ b/projects/packages/woocommerce-analytics/changelog/fix-phan-issues_in_old_woo
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Improve compatibility with old WooCommerce versions.
diff --git a/projects/packages/woocommerce-analytics/src/class-wc-analytics-tracking.php b/projects/packages/woocommerce-analytics/src/class-wc-analytics-tracking.php
index 79f2774ae1ddd..b70a950aabca5 100644
--- a/projects/packages/woocommerce-analytics/src/class-wc-analytics-tracking.php
+++ b/projects/packages/woocommerce-analytics/src/class-wc-analytics-tracking.php
@@ -231,6 +231,7 @@ public static function send_batched_pixels() {
 		foreach ( self::$pixel_batch_queue as $pixel ) {
 			// Check if the method exists for backwards compatibility with older WooCommerce versions.
 			if ( method_exists( WC_Tracks_Client::class, 'add_request_timestamp_and_nocache' ) ) {
+				// @phan-suppress-current-line UnusedPluginSuppression @phan-suppress-next-line PhanUndeclaredStaticMethod -- We verify the method exists before using it. See also: https://github.com/phan/phan/issues/1204
 				$pixels_to_send[] = WC_Tracks_Client::add_request_timestamp_and_nocache( $pixel );
 			} else {
 				// Fallback for older versions - add timestamp and nocache parameters manually.
@@ -387,7 +388,7 @@ public static function get_server_details() {
 			$data = parent::get_server_details();
 		} elseif ( method_exists( WC_Site_Tracking::class, 'get_server_details' ) ) {
 			// WC < 6.8
-			$data = WC_Site_Tracking::get_server_details(); // @phan-suppress-current-line PhanUndeclaredStaticMethod -- method is available in WC < 6.8
+			$data = WC_Site_Tracking::get_server_details(); // @phan-suppress-current-line PhanUndeclaredStaticMethod -- method is available in WC < 6.8. See also: https://github.com/phan/phan/issues/1204
 		}
 
 		return array_merge(
@@ -413,7 +414,7 @@ public static function get_blog_details( $blog_id ) {
 			return parent::get_blog_details( $blog_id );
 		} elseif ( method_exists( WC_Site_Tracking::class, 'get_blog_details' ) ) {
 			// WC < 6.8
-			return WC_Site_Tracking::get_blog_details( $blog_id ); // @phan-suppress-current-line PhanUndeclaredStaticMethod -- method is available in WC < 6.8
+			return WC_Site_Tracking::get_blog_details( $blog_id ); // @phan-suppress-current-line PhanUndeclaredStaticMethod -- method is available in WC < 6.8. See also: https://github.com/phan/phan/issues/1204
 		}
 		return array();
 	}
diff --git a/projects/packages/woocommerce-analytics/src/class-woo-analytics-trait.php b/projects/packages/woocommerce-analytics/src/class-woo-analytics-trait.php
index 26c69b221e82a..648c1ee2fce28 100644
--- a/projects/packages/woocommerce-analytics/src/class-woo-analytics-trait.php
+++ b/projects/packages/woocommerce-analytics/src/class-woo-analytics-trait.php
@@ -172,6 +172,7 @@ public function find_cart_checkout_content_sources() {
 
 		$this->cart_checkout_templates_in_use = wp_is_block_theme()
 			&& class_exists( '\Automattic\WooCommerce\Blocks\Package' )
+			// @phan-suppress-current-line UnusedPluginSuppression @phan-suppress-next-line PhanUndeclaredClassMethod -- If the class exists (as of WooCommerce 8.5.0), the method exists. See also: https://github.com/phan/phan/issues/1204
 			&& version_compare( \Automattic\WooCommerce\Blocks\Package::get_version(), '10.6.0', '>=' );
 
 		// Cart/Checkout *pages* are in use if the templates are not in use. Return their content and do nothing else.
@@ -260,6 +261,7 @@ public function find_cart_checkout_content_sources() {
 	public function get_common_properties() {
 		$site_info = array(
 			'blog_id'        => Jetpack_Connection::get_site_id(),
+			// @phan-suppress-current-line UnusedPluginSuppression @phan-suppress-next-line PhanUndeclaredConstantOfClass -- The constant has only existed since WooCommerce 8.4, but we check for its existence. See also: https://github.com/phan/phan/issues/1204
 			'store_id'       => defined( '\\WC_Install::STORE_ID_OPTION' ) ? get_option( \WC_Install::STORE_ID_OPTION ) : false,
 			'ui'             => $this->get_user_id(),
 			'url'            => home_url(),
diff --git a/projects/plugins/wpcomsh/changelog/fix-phan-issues_in_old_woo b/projects/plugins/wpcomsh/changelog/fix-phan-issues_in_old_woo
new file mode 100644
index 0000000000000..2251b821a5dad
--- /dev/null
+++ b/projects/plugins/wpcomsh/changelog/fix-phan-issues_in_old_woo
@@ -0,0 +1,5 @@
+Significance: patch
+Type: fixed
+Comment: Suppress Phan confusion.
+
+
diff --git a/projects/plugins/wpcomsh/woa.php b/projects/plugins/wpcomsh/woa.php
index b705fdd6bb211..1d850625f0197 100644
--- a/projects/plugins/wpcomsh/woa.php
+++ b/projects/plugins/wpcomsh/woa.php
@@ -430,6 +430,7 @@ function wpcomsh_woa_post_process_store_woocommerce_connection_details( $args, $
 	WP_CLI::success( 'WooCommerce connection details stored' );
 
 	if ( class_exists( 'WC_Helper' ) && method_exists( 'WC_Helper', 'refresh_helper_subscriptions' ) ) {
+		// @phan-suppress-current-line UnusedPluginSuppression @phan-suppress-next-line PhanUndeclaredStaticMethod -- We check if the class and method exist before using them; see https://github.com/phan/phan/issues/1204
 		WC_Helper::refresh_helper_subscriptions();
 
 		WP_CLI::success( 'Cleared WooCommerce Helper cache' );