[SOLVED] Kernel panic installing rocky or almalinux

you cannot use kvm64, since that doesn't have all the features that that distro requires.. you need to use a CPU type that does (either one of the physical ones matching your CPU, or host, or the "bumped baseline" x86-64-v2-AES). please read the docs, they explain it in more detail.
 
so right now almalinux 9 still cant running under cpu-type kvm64 ?
it should be set to host ?
You could do 'host' (which would also give you more performance) or in the Proxmox 8.x series, you could use the new default of 'x86-64-v2-AES' which gives you greater compatibility of Proxmox features (like Live-migration) when it comes to having different servers with different cpu generations all in the same cluster.

I hope that was helpful!