Apparently the contracts for the F35 didn't mention "Intellectual property" at all, and now the government now regrets the oversight (especially with regards to the source code for the software running on those planes) [1]

As for licensing to put the f-22/f-35 in a game/movie, I wonder how much of that is actually needed from a legal perspective, and how much is "lets just do it anyway".

The name is covered by trademark so you need a license to call it "F-35 Lightning", but I don't think the design or shape of an aircraft is covered by copyright or trademark law, so it should be fine if you just avoid the name.

[1] https://www.nationaldefensemagazine.org/articles/2016/9/8/in...