There is no "official" support for Windows 11 by MDT - however, it's possible to still use it - for details, refer to https://learn.microsoft.com/en-us/answers/questions/1325234/why-is-there-no-mdt-support-for-windows-11
Alternatively, you could leverage paid-for alternatives from Microsoft (Autopilot combined with Intune or Configuration Manager) or third party products
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hth
Marcin