Alex, since you're here does quadlet support override files like systemd's /etc/systemd/system/foo.service.d directories? I couldn't find it in the documentation.
The generator doesn't do that atm no. Seems like it would be useful though.
On the other hand, I belive systemd would load override files for the generated .service file, although those can just override details on the systemd level, not the generated podman command.