I’ve started a PR to support Puppet 7. In particular Puppetserver 7.
The most notable breakage is that facts are no longer updated. Since the old YAML files are still present and not cleaned up, it appears to work but the data will be stale.
I haven’t been able to find out how to actually write out these facts but I thought I’d give a heads up to any users. Maybe someone here actually knows the right config options.