Nvm, found it on the site:

Pinepods has it’s own gpodder server that’s a switch flip in settings to start using, it also supports external gpodder servers like opodsync or Podfetch, and it supports Nextcloud gpodder sync - your choice.

Sorry I haven’t looked into your project before but I currently use AntennaPod with Nextcloud Gpoddersync, could I plug PinePods into Nextcloud or does it only work with the Pinepods docker server?