Apparently the US Department of DefenseWar thinks that they can order non-US citizens not resident in the USA to cease and desist from mailing things.
Uh…
Hilarity of the items involved aside, the gall of the US military postal service to give orders to civilians not under their command and not even of their nation is shocking.
You had it right the first time.
Congress hasn’t made the name change official.
It’s not legally changed just because Trump waved his magic
wandsharpie and wished it to change.