However the story might be different in a decade as sixth gen aircraft like Tempest are entering service and probably other modern technologies like unmanned/autonomous drones and hypersonic and directed energy weapons are more widely deployed. Connectivity between units in the field is also clearly a huge deal that is going to matter more and more and that is going to require a level of interoperability and trust that won't be kind to "partners" who aren't good team players.
On that kind of timescale I expect "buying American" will be much less attractive to most "allies" of the US than it has been for most of the past century and it will show exactly in decisions like who is making and buying whose planes.