Yep, I tried three or four of the subsequent kernels that came out after and the effect was still the same. I gave up trying further ones after that, since the elrepo one worked. I could of course raise a bug report for it, but I’m not that entirely bothered about it. Either it wasn’t meant to happen and thus a regression, or it was intentional. I would have expected it to work at least until the EOL of EL9.
Since the server doesn’t support x86_64-v3, I’ll be retiring it in 2032 anyway assuming it doesn’t break before then.