Microsoft have released updates to Windows 10 for Windows Insiders on Release Preview. KB5006738 takes Windows 10 21H1 to 19043.1319 and Windows 10 21H2 to 19044.1319, both updates just contain just the one fix:
We fixed a known issue that might prevent the successful installation of printers using the Internet Printing Protocol (IPP).
Windows 10 21H2 will be called the Windows 10 November 2021 Update.