For anyone going down the road of attempting to use your Bubble app as an Identity Provider here is where I landed;
- the documentation per above is an illustrative description of what other Identity Providers might provide to you in your Bubble app eg you are fiddling around with the API connector.
- per this API | Bubble Docs - what isn’t mentioned is the scopes that the Bubble app has
- I don’t think the Bubble app’s the built-in 3rd party Oauth capability has the ‘openid’ scope - so can’t be used with OpenId Connect OIDC Connectors.
- If someone does know - I’d love to know … but solving the cost/benefit of solving this problem no longer stacks up and it’s Auth0 for this project now

Good luck. Hope this saves someone a bit of time 
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