Under a pure Wayland session, TLoU2 runs at an unplayable 1–5 FPS.

Workaround

Install XWayland on your distro (so Proton can fallback to X11):

(download your distro’s equivalent “xwayland” / “xorg-x11-server-Xwayland” package)

Log out of your Wayland session and back in.

In Steam, right‑click The Last of Us Part II → Properties → Launch Options, and paste:

PROTON_LOG=1 SDL_VIDEODRIVER=x11 GDK_BACKEND=x11 QPA_PLATFORM=xcb %command%

Launch the game.