We can include the A12Z developer transition kit, which is an 'Apple Silicon Mac' which was available since July.
The problem here is that in WWDC, Apple showed Docker Desktop running on an Apple Silicon system (maybe suggesting that it is at least running) and here we are in November it is still not running or not known if Apple Silicon is supported.
I don't see any patches in the Docker repositories on such support, thus maybe Apple has a private fork for Apple Silicon. In general it is not available to us and we don't know when it will be.