I think there is already an OpenGL implementation over Nouveau (4.5 level)? So that can exists as is, or Zink can be an option. And remaining 4.6 parts are Vulk

I think there is already an OpenGL implementation over Nouveau (4.5 level)? So that can exists as is, or Zink can be an option. And remaining 4.6 parts are Vulkan related, so may be it can reach 4.6 without Zink too now.