It does not directly affect wayland support in any way unless you’re using one of those experimental Wayland in Vulkan modes.
It does affect it indirectly insofar as that, with NVK, you’re able to use the nouveau kernel module which exposes standardised interfaces that Wayland relies on without losing the ability to do Vulkan which was not possible previously. If you wanted Vulkan previously, you had to use Nvidia’s proprietary driver and its non-standard interfaces that cause issues with Wayland.