CentOS 7 was already approaching end of life a few years ago, and it’s dead now. There are reasons not to use CentOS 8 or its enterprise counterparts, but this is still very old software for a supposedly new-ish system.
I never really got why manufacturers like these went for CentOS when Ubuntu exists. You get the same level of support, with the same packages if you really want that SELinux experience, except you can actually upgrade between versions.