I can't speak for Chrome, but I can right click a Firefox picture-in-picture window, tell it to remain on top, and it does, no problem. I've been using Plasma Wayland for years now and this has worked for ages
The issue is you have to do that every single time. On X11, they remain on top by default
The issue is you have to do that every single time. On X11, they remain on top by default