Hello,
Thank you for posting in Q&A forum.
The source code of the Windows Subsystem for Android (WSA) project is currently not open to the public. It is currently unclear whether Microsoft will open its source code to other communities for further development after announcing the cessation of support for the WSA project. Usually, Microsoft evaluates future plans and strategies to decide whether to open up the project's source code to other communities. If Microsoft decides to open up the source code of the WSA project, they may provide more information in future announcements.
Hope this answer can help you well.
Best regards,
Jill Zhou