Probably obvious, but just changing the IDP does not work lol. But had to see for myself. I created an instance with Zitadel, setup a few things. Then reconfigured the compose file and config files to accept authentik as the IDP with the same NetBird DB. No dice lol. But had to see for myself.
I’ve now settled on starting over a new instance with Zitadel and will continually add IDPs as required