Back in January we reported on how NVIDIA was looking to support hardware accelerated GL and Vulkan rendering with Xwayland, and it seems it's continuing to progress.
To save you a quick click: in the Merge Request to the xserver, NVIDIA engineer Erik Kurzinger mentioned their patches were intended to support a new upcoming Linux driver release and with the patches and the new driver together it "should just start working". Performance should be fine in full-screen games, as long as the compositor supports the required zwp_linux_dmabuf_v1 interface.
All important work, as XWayland will be used when Wayland replaces the legacy X11 display server most distributions and most gamers use to ensure your games continue working.
In recent comments, Kurzinger mentioned some new work added in to "allow running Xwayland on the integrated GPU of a laptop and having individual applications run on a dedicated NVIDIA GPU" which is similar to the X11 GPU offloading you can do currently. Meaning that this should work nicely for hybrid graphics laptops with Wayland. Additionally, this should all be out in the next "long-lived branch" driver release (which nvidia now officially call "Production Branch") with the upcoming 470 driver.