When/if Windows BCrypt supports Composite ML-DSA (implied by https://techcommunity.microsoft.com/blog/microsoft-security-blog/post-quantum-cryptography-comes-to-windows-insiders-and-linux/4413803), we should GenerateKey and the import routines on Windows to use the BCrypt "single key" approach.
When/if Windows BCrypt supports Composite ML-DSA (implied by https://techcommunity.microsoft.com/blog/microsoft-security-blog/post-quantum-cryptography-comes-to-windows-insiders-and-linux/4413803), we should GenerateKey and the import routines on Windows to use the BCrypt "single key" approach.