They often work with the community in helping the ports for a lot of these projects, it's just not publicized as much (and often their engineers aren't allowed

They often work with the community in helping the ports for a lot of these projects, it's just not publicized as much (and often their engineers aren't allowed to talk about it). E.g. when Apple Silicon was released there were people in various FOSS projects who worked with Apple assistance for porting. Here's an example that comes to mind: "In collaboration with the Metal engineering team at Apple, we are excited to announce support for GPU-accelerated PyTorch training on Mac." https://pytorch.org/blog/introducing-accelerated-pytorch-training-on-mac/ https://pytorch.org/blog/introducing-accelerated-pytorch-tra...