Sorry for the delayed response. I ended up building a new Windows Server 2019 machine. Installed the windows 11 ADK, Installed the Windows 11 Pe Tools. Installed the latest version of MDT (Deployment Workbench). extracted MDT_KB4564442, and copied to %ProgramFiles%\Microsoft Deployment Toolkit\Templates\Distribution\Tools (x64 / x86)
recreated build and capture task sequence
recreated deploy task sequence
Tested build and capture and deploy successfully. (my old server was server 2012 and was originally used for win7 which has been upgraded over the years. (cant say what resolved it as I ended up building a new server. (it took a few days but now I have a working MDT building windows 10 21H2.
Thanks Matt