US air doctrine is that they will always buy air dominance, so Boeing will be funded for military programs. However, the US govt. historically has had the influence to tell military aircraft mfgs. what to prioritize, and what lines to drop.
An example is Northrop. They were told to drop the popular F-5 and F-20, and focus on the B-1 program. They were also told to merge with a competitor, but declined.
It's weird when you first study it, but the US Air Force wants zero risk missions into enemy skies.
So that's why they're ok with a handful of $200 million fighters and $2 billion bombers, if they're stealthy enough not to be seen.
(Stalin on the other hand is often attributed with saying, "Quantity has a quality of its own." I would argue a balance is needed between a perfect fighter, in the case of the F-22 with under 200 airframes mfg., and having 10,000 slightly less perfect ones, like the F-16.)
W: F-22 https://en.wikipedia.org/wiki/Lockheed_Martin_F-22_Raptor
(Coronavirus death toll now larger than Vietnam)
Guess that is why Taiwan also would not want the asset out.
There have to be a political deal. If USA and Taiwan is competent.
I don't quite understand what you mean by this, what is the context of US support for Boeing?