This will really be an interesting question for the so-called global south. Since most countries there are generally considered to politically align with China/Russia due to “anti imperialism”, it’s going to be interesting to see if they remain on the side of Russia although this is now the side of the US or whether they alternatively remain opposed to the US but find themselves on the same side as the Europeans.
Turns out the supply chain for such a complex machine is in itself very complex. Some components are manufactured by suppliers in various countries formerly believed to be allies. This includes stuff like the ejection seats and some electronics that are made in the UK, parts for the wing sets that are made in Italy or inserts for the weapon bays that are made in Canada. Additionally the Netherlands currently houses the supply hub for spare parts for the European countries. It is estimated that there are spare parts to keep hundreds of F-35s in the air for a while there. The most worrying aspect certainly remains the software support, without which all the precious hardware loses much of its utility, even if there isn’t a master kill switch.
And the US negotiation team will respond: “Yes sir, we agree that all of your terms need to be met. Now we can finally suspend all aid to those pesky Ukranians again and lift all sanctions, since Uncle Vladimir is totally in favour of peace!”