Some Wayland core folks don’t want applications to know if their window is visible or not because it’s mild information about a user’s attention that should be private.
I do like that. I have encountered a number of bullshit things like HR mindless training videos (ok, the fourth time I’ve seen this guy contemplate accepting a bribe… I get it. Don’t accept bribes! Leave that shit to Clarence Thomas) or ad playbacks that refuse to proceed unless they are focused. It’s annoying as hell. The problem you point out also sounds really annoying.