Ssh root login disabled

How do I protect ssh login for AlmaLinux 9 ? PermitRootLogin No in /etc/ssh/sshd_config file didn’t work

The default is now PermitRootLogin prohibit-password.

If you did select in installer the “Allow root log with password”, then there is file
with PermitRootLogin yes in it. You can remove that file.

The /etc/ssh/sshd_config does contain Include /etc/ssh/sshd_config.d/*.conf early and “the first obtained value will be used”.
Therefore, you should add file into /etc/ssh/sshd_config.d/.
Perhaps named 00-akpaninoroot.conf and have in it:
PermitRootLogin no