We can get ASRAAM on F-16 and F-35. And iirc there was USN involvement in Australia F/A-18 ASRAAM integration so if a US hornet was used to test we could get it on that even
Aim9x is getting its blk3 upgrade finally the navy decided to pursue it after it was canceled in 2016. The blk3 upgrades consist of a 6th-generation seeker and a new motor for more range and to accelerate faster than the blk 2. So aim9x might not be the weakest anymore.
Who knows honestly it still could be worse or it could be on a similar level but this upgrade needed to happen to bring aim9x up to par it was falling behind a bit.