Staying in this new topic is probably better because of it being a seperate issue, I was just checking that you’d tried them in case it also fixed your issue.
I just did a quick search and apparently you could reset the positions 3 yeas ago:
Gear icon on the top drop-down menu, reset windows.
https://www.reddit.com/r/MicrosoftFlightSim/comments/inko0r/any_way_to_reset_window_positions/
Hopefully that option is still available!