Why?
It makes no sense for a government/military to use a proprietary system made in another country when there's a very strong movement inside of said government for an open system. They have incredibly smart people at SUSE, Manjaro and KDE right on the inside and you are telling me they can't do better than hitting subscribe on Office365?
Assume the EU and US have a conflict, now the EU is stuck with an entire ecosystem made in the US. Assuming they don't already have all your internal data, they can just get it with a single click.
Do you happen to know if you still need the HDR layer when using Wayland directly? I know gamescope didn't require it for a while now but I never saw anything about it for Wine.