Please branch and build lightdm-settings in epel8 and epel9. If you do not wish to maintain lightdm-settings in epel8 and epel9, or do not think you will be able to do this in a timely manner, the EPEL Packagers SIG would be happy to be a co-maintainer of the package; please add the epel-packagers-sig group through https://src.fedoraproject.org/rpms/lightdm-settings/addgroup and grant it commit access, or collaborator access on epel* branches.
I've tried to find the time, but it doesn't look like it is going to happen. leigh123linux, can you add the EPEL Packagers SIG to the maintainers list for EPEL?
Done https://src.fedoraproject.org/rpms/lightdm-settings