I was unsure if I installed docker on this machine so I ran docker-compose and the help page showed up (another one than for podman-compose). Then I queried my installed packages and grepped them for docker and nothing shows up. Only podman-compose has docker in the description. So I accidentaly used that compatibility layer already without knowing.

But one reason I consider to switch is because compose files are not really standardized I heard and quadlets are structured like systemd files so I seems more applicable. But that is still a long way.