FP3+ Android 11 screen resolution is not correct @rae
The screen resolution is not correct, something has slipped the developers.
left picture: view in Gallery full screen
right picture: set as background (you see, its cut)
I had this effect on all my phones in the past, on all Android versions. I guess this is intended behavior, because the wallpaper is not static but moving when the user slides trough home screens (which explains why the wallpaper is not 100% shown on left and right).
Since Android 11 there is also a little zoom out effect of the wallpaper (when sliding down the settings / notification menu), which explains why it can not be displayed 100% on top and bottom.
Maybe this depends also a bit on the launcher you are using (I use Nova), but in general I can not see a bug in that.
If I misunderstood, please correct me.