Earlier quoted context omitted.
You can't ship Game Porting Toolkit with your game, though. DXVK doesn't have this limitation, and developers use it all the time. In effect, this means the number of games you get with native Vulkan coverage is a magnitude higher than the total sum of all Metal-native desktop titles.
This isn't completely true. Crossover is allowed to ship the GPTK components for API translation (which they currently do as of 23.5) and games are allowed to embed Crossover elements like they did in the pre-Metal days with Cider etc. All this talk of DXVK doesn’t explain why games based on engines with native metal support aren’t on a Mac either.
They might not.