Docker is still super early in development, see the most recent update here: https://github.com/docker/roadmap/issues/142#issuecomment-73...
I wouldn't expect official stable support to be available very soon. Even then, even if most of the official Docker image library will have ARM support, a ton of community images will need to be ported – all of this will take quite some time.
Re:Why is Apple's M1 chip so fast?
by faitswulff on Tuesday December 01, 2020 @07:14AM
(#25264513)
Not to mention Homebrew and associated packages.
https://forums.macrumors.com/threads/success-virtualize-wind...
https://forums.macrumors.com/threads/ubuntu-linux-virtualize...
https://twitter.com/morlhon/status/1332609373051478016?s=21