Why? Specs for link16 jamming have been circulating since before the invasion of ukraine, there is a whole DoD technical report dedicated to trying to update it knocking around somewhere.

Iran claim to have used it to bring down US drones in the past.(1)

1. https://www.csmonitor.com/World/Middle-East/2011/1215/Exclus...

That link is about GPS spoofing, not Link 16 jamming, those are two different radio systems and two different attacks.