Edit: This failed to be moved with the others - this should be the first post in the thread.
Indeed - but the question was …
… which you (fundamentally, and in the context of that question) cannot.
To say otherwise without the qualification that you have to mod the MP is misleading.
Obviously they can modified to do all sorts - you could rip out the works and replace with your own hardware/firmware and fly inverted if you were really of a mind to - but I think demonstrating that you’d modded the MP to fly ATTI and not have any GPS mode when you are taking your PfCO would probably result in a fail.