Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Nevertheless, after searching what we've found for you in here - Open Support cases for GCC High and DoD - Microsoft 365 | Microsoft Learn or you can share your precious idea in here -gcc · Community (microsoft.com).
Thanks for your precious time and your understanding would be highly appreciated.
Oh the irony that the second link is a link I cannot open for exactly the reason I'm complaining about.