With Owlbear Rodeo 2.0 getting officially released the developers haven’t quite made made good on their promises to open source the original Owlbear Rodeo (releasing under a non-commercial license instead of a proper Open Source license what they are now calling “Owlbear Rodeo Legacy”), but the source is available on GitHub, complete with a docker-compose file to spin up your own instance.
To be fair to OP, they didn’t say open source until their response to your comment. They just said source code released for non-profit use. You are correct, though, that this is not open source.
Your account is set as a bot account. You probably want to switch that off in your account settings.