I have upgraded my bootcamp Windows 10 to Windows 11, no issue at all and just received first update.
Just use this tool to automatically download and deploy:
GitHub - AveYo/MediaCreationTool.bat: Universal MCT wrapper script for all Windows 10/11 versions from 1507 to 21H2!
Universal MCT wrapper script for all Windows 10/11 versions from 1507 to 21H2! - AveYo/MediaCreationTool.batgithub.com
Really nice upgrade visually.
This was quite possibly the easiest thing I've ever done to get Windows 11 working on my Mac Pro, fully automated, simple, and zero issues.