Rocky Linux 8 is 1:1 binary compatible RHEL 8 clone, created from some source files as RHEL 8 itself.

Can you please add support for Rocky Linux 8 into install.sh script?

If I manually create file /etc/yum.repos.d/nginx-amplify.repo with content:

[nginx-amplify] name=nginx amplify repo baseurl=http://packages.amplify.nginx.com/py3/rhel/8/$basearch gpgcheck=1 enabled=1 

I can install nginx-amplify-agent using command yum install nginx-amplify-agent.
After installation amplify-agent service can be started and run on the Rocky Linux 8.6