There are several areas in which the NVIDIA driver lacks feature parity between X11 and Wayland. These may be due to limitations of the driver itself, the Wayland protocol, or the specific Wayland compositor in use. Over time this list is expected to shorten as missing functionality is implemented both in the driver and in upstream components, but the following captures the situation as of the release of this driver version. Note that this assumes a compositor with reasonably complete support f...
Not with everything, Nvidia stood still on explicit sync, in that case it were the idiots at Freedesktop that were massively blocking Wayland’s progress, trying to force an inferior technology, which Nvidia did not want to implement.
Okay, but that’s still partially on Nvidia for refusing to participate. They could have argued for explicit sync early in Wayland’s development but they weren’t at the table at all, so they got stuck with the technology that was decided on without them and had to argue for changes much later.
And they started off arguing for EGLStreams, but it didn’t work well either. Explicit sync came later.