I tried to install CyberPanel on AlmaLinux 8.4 yesterday, and it said it was an unsupported OS. 
I’ll look at install.sh.
But CyberPanel looks awesome so far when I tested it under CentOS 8.4.
AlmaLinux is from CloudLinux, so it should be stable as they have the experience of building it from RHEL.
So should Rocky Linux, since they have the original creator of CentOS.
Kinda a toss up of which OS to use.
Glad you guys will support both.