Call of Duty and Battlefield both run at 4K@120 with dynamic resolution scaling, PSSR or FSR.

Most single player games (Spider-Man, God of War, Assassin's Creed etc) will allow a balanced graphics/performance which does 40 in a 120hz refresh.

Full 4k - very few, but lots are running adaptive resolutions at > 2k and at 120hz

Touryst renders the game at 4K120 or 8k60. In the latter case, the image is subsampled to 4K output.