You are right, but there is always some trueness to those rumors, they don't get into surface out of nowhere.This is an unsubstantiated claim from some, while it is possibly true, we can't be certain. In the latest TurDef article there was another claim that US was looking unfavorably to transfer of AIM-120C8 and SABR radars. This is also unsubstantiated for now.
What is for sure is that Turkey is in need of multiple jet engines and modernization of it's Air Forces, i don't think that USA will fully block this request but some sort of middle ground will be found.