[jrockway]

This sounds about right to me. At work, we make a rather complex stack that uses quite a few third-party containers. When we wanted to do arm64 support a couple years ago, most of these dependencies did not support arm64, so we had to build and publish the containers ourselves. (We already sort of had to do this anyway, because customers ran into Docker rate limiting issues, and images from our account aren't rate limited because we pay them not to. But when we only supported amd64, we just re-tagged and pushed.)

As an aside, some comments in this thread say "just look at the layers", but that's the wrong level of abstraction for multi-arch images. In the past, when you ran "docker pull ..." you were looking for an Image Manifest: https://github.com/opencontainers/image-spec/blob/main/manif.... But now in the world of multi-arch, you are getting an Image Index first: https://github.com/opencontainers/image-spec/blob/main/image...