Yes, it has. However, you have to switch to game mode in the menu, it doesn't do that on its own. I had already played Assasins Creed Odyssey in 4K and it looks fantastic. However, only about 80 to 100 frames, because my Graka is too weak on the chest. But I didn't notice any screen tearing or shuttering.

And make sure you use an HDMI cable that supports 4k at 120 Hz (48 Bbps). Otherwise it's useless.