Vulkan is not vendor-dependent. It runs on AMD, NVIDIA, Intel, and Qualcomm chipsets. It runs on a huge number of operating systems.
(Vulkan performance on the Pi 4 just got a big performance boost, btw.)
It seems the only gotcha is that Apple is being difficult and not supporting Vulkan on MacOS, but MoltenVK is "within a handful of tests" of Vulkan 1.0 conformity.