The GoLang issues that affect Docker on arm64 specifically have been logged in the Go issues, though they are not called out as such in a single tag or project.
Some of these issues include other impact upstream or downstream, ie. that deal with issues in the greater Docker ecosystem as opposed to the build of Docker specifically.
I've pulled out the highlights of all of the issues I'm aware of and tracking, for your review. For others, the search string 'arm64 OR aarch64 OR armv8' is generally necessary in Github to find everything related.