I'm running flatpak obs on fedora 36 with an nvidia card on wayland. I have also tried the unofficial fedora release and have had the same results. For some reason pipewire capture is incredibly laggy. Without even starting a stream or recording obs lags down to single digit fps. I tried the same thing on my much less powerful old nvidia laptop. And pipewire recording on both open and nvidia drivers on wayland ran at a smooth 60fps.