We've Python 3.6 on Dwellers and docker-001. That's OK as Salt dependency as salt uses #!/usr/bin/env python36 but we can also install Python 3.9 by default:

$ dnf install epel-next-release
$ dnf install python39 python39-pyyaml python39-requests
$ ln -f -s /usr/bin/python3.9 /etc/alternatives/python3