Hello Joseph Hine,
If you mean that you would like to add multiple Google accounts to Google Chrome on Windows 11, this is managed through Google Chrome rather than through Windows.
Since this forum primarily provides support for Microsoft products and services, detailed instructions for managing Google accounts in Chrome would be outside its scope. Please contact Google Support or post your question in the Google Chrome Help Community for the appropriate guidance.
If you are experiencing a problem installing or running Chrome specifically on Windows 11, please provide more details about the issue.