There will be no passport control what so ever for inner Schengen flights so it doesn’t matter what passport you are holding so it’s more likely to have to do w

There will be no passport control what so ever for inner Schengen flights so it doesn’t matter what passport you are holding so it’s more likely to have to do with the design of the arrivals routes as well as being able to selectively configure arrival gates for Schengen vs international to make sure that only Schengen flights bypass passport control.