We deployed our devices via Autopilot. We seleted the option "Operating system default" as language, to be able to deploy images with different languages.
For the most systems we use an ISO directly from Microsoft, with only german language installed.
All language settings inside the windows 10 installations are correct set to "German (Germany)".
But the region for the new DMA-Settings is not correct. Only installations with a directly selected language in the autoprofile getting the new settings.
I checked the whole documentation and i didin`t find anything about difference between Language and Region by using the Option "Operating system default".
"For Language (Region), select Operating system default to use the default language for the operating system being configured."
https://learn.microsoft.com/en-us/autopilot/tutorial/user-driven/azure-ad-join-autopilot-profile#create-and-assign-user-driven-microsoft-entra-join-autopilot-profile
Maybe i misunterstood something?