I’m not sure what the best place to post this is; there doesn’t appear to be a “maybe this will help other people” section. So my apologies if I’m in the wrong place!
Dunno if this will be of any use to anyone, but I wrote up how I do automated “unattended” installs of Rocky 8 and 9 using virt-install and kickstart files. (There’s also stuff about Debian Linux, but you can skip those parts :-)).
Maybe this it will help other people!