How to call BYOF API from non-Production environment

[TheMightyBorkon]

In the Production environment of an SWA, I can link to an existing Functions App (ie. Bring Your Own Function), and the Azure portal does all of the configuration so that calls to the "/api/..." path are resolved correctly and redirected to the BYOF App.

However, if I try to call API endpoints from a non-Production SWA environment, then I just get 404s. There is no facility in the Azure portal to link to a BYOF App from anything other than Production.

Is it possible to call API endpoints from other environments? If so, how do I go about configuring that?