running the stuff in the title, tried a buncha switches for chromium/electron stuff but still the load mesured with e.g. amdgpu_top doesn't show "Media" usage. playing other stuff (VLC, Dragon, mpv) shows "Media" usage, which means those are using hardware acceleration.

edit: in the meantime tried the portable version as well, same results so it isn't a flatpak issue.

edit 2: as @thingsiplay@lemmy.ml found, running portable and flatpak with --enable-features=AcceleratedVideoDecodeLinuxZeroCopyGL,AcceleratedVideoDecodeLinuxGL,VaapiIgnoreDriverChecks under X11/Xwayland produces hardware accelerated video. that doesn't seem to be the case with wayland, the media graph stays at 0% and there's a buncha dropped frames with e.g. 4K video.