BFF (Backend-for-Frontend) Authentication pattern using A12

Is there a project which has implemented the BFF Pattern ( The Backend for Frontend Pattern (BFF) | Auth0 ) successfully using A12 (Instead of the default SPA Client Authorization Code Flow)?

It would be great to get some input / examples / exchange on how this was done in conjunction with A12 client, UAA and Dataservices.

I already know that UAA supports this, so i am looking for some integrated examples / best practises.

Cheers

Sebastian