The repo files in rootfs/etc (for yum.oracle.com) and script in rootfs/update (for ULN) miss the ovirt-4.5 repos because they're in an RPM called "oracle-ovirt-release-45-el8-1.0-39.el8" because they don't match the patterns for other repo files.
The missing ovirt-4.5 repos could be added via default "extras" file in /config or, preferably, get a complete list from dnf repoquery --whatprovides '/etc/yum.repos.d/*' --qf '%{name}'. (It's sufficient to restrict that to the ol*_latest repo). I don't know what works for uln, sorry and for OL7 just miss off the dnf from the command.