The current plan is for the upcoming 8.14 release to include a pre-built arm64 windows build. This will be the first release to include this as a pre-built option, which means that there could easily be some interesting problems with it.
If you have a machine that runs windows on Arm64, it would therefore be great if you could give this pre-built binary a spin; it's available at
https://pre-release.racket-lang.org/
Please keep in mind that this is a pre-release; it has a weird version number (8.13.900), and ... well, other than that it should probably work more or less like a regular release. Let us know about problems you run into with this version!