If you can move your listening position like this, that seems to solve most of the issue.looked like this using iPad, since Android asks me to point my phone and app goes upside down sometimes.
View attachment 26845
then after moving the mic 50cm forward (front of sofa) using Android again, Umik1 mic always:
View attachment 26846View attachment 26847
The rest I'd try to solve by adding additional +3dB gain to Sub Out, and by configuring RoomFit correction range 21Hz-200Hz.
Note that RoomFit will only ask you to turn your phone upside down when MMM option is enabled. If you disable it this will not happen, and you will get back the Individual Channel RoomFit variant as well.