Please branch and build qt5-qtwebkit in epel10. If you do not wish to maintain qt5-qtwebkit in epel10, or do not think you will be able to do this in a timely manner, I would be happy to be a co-maintainer of the package (FAS: jonathanspw); please add me through https://src.fedoraproject.org/rpms/qt5-qtwebkit/adduser
Please have a look at https://bugzilla.redhat.com/show_bug.cgi?id=1872819 as it's the reason why it's retired for EPEL 10 branch