Does Docker have uarch level support? I think similar to arch level, it could be beneficial being able to pull a v4 image.
Ubuntu started allowing defaulting to v3 packages, and I opted in. I already use the -C native to enable AVX512 when compiling binaries for local use. This matters a lot for compute/analytics workloads in my experience.
Yes, it's in the platform options. You can specify --platform linux/amd64/v3 for a v3 image.