Honestly all, I have to agree with the Dev's here on this one. Not only are there a lack of proper API's to handle the foldable routines, but writing them yourself isn't really all the doable (I work in App Dev) unless you try to do something from scratch that will only get updated out of existence with Android 12L (12.1). Google already stated that this version will specifically support larger displays as well as multi-screen (foldables) is coming soon, so let's give them a little break and wait and see what they decide with 12L.
If they keep their stance without even looking closely into it, then flame away!