The project is currently mainly focused on upstreaming as many of their patches as possible, and maintaining the existing code. M3/4/5 have a completely differe

The project is currently mainly focused on upstreaming as many of their patches as possible, and maintaining the existing code. M3/4/5 have a completely different GPU instruction set from M1/2, so they would need a large amount of new reverse engineering to get the GPU support where it is on M1/2. I don't believe there's anyone working on GPU support for those newer platforms.