I'm sure there is a better way to ask this, so I apologize in advance!
My Pi 4 seems convinced I have 2 displays connected. I can change the resolution for HDMI-1 and HDMI-2, despite just having 1 monitor connected. This wouldn't be an issue except I can't maximize a window - it will only maximize to the size of that "phantom" HDMI-1. Does this make sense? I think I am trying to ask how I can configure things so that when I modify resolution or other display settings, it's only for the 1 display that's actually connected?