I agree, but not sure how these should be exposed as ENV(s). I mean, should all group be in a single env? Or one env per group?
Personally I think this would be better to handle through the API: Bitrise Public API
Feel free to request an endpoint for this use case. With that it will be easy to write a script or a Step which can expose the emails you want (e.g. only the testers + devs groups’).