Iran's US supplied aircraft are still seen out over the Gulf to this day. F-14s, F-4, F-5s and P-3s are still very much active.
I would be astonished if they were doing much more with their F-14's than flying a rare sortie with one cobbled together from parts cannibalized from their basket case spares. As a former USN jet mechanic, I know it took a lot of maintenance to keep those beautiful planes in the air.
I don't doubt they are still flying their F-5 and F-4 aircraft, since there is a ready supply of spare parts around the world (I would guess...I don't know that for sure, but we sold so many of those all over the world.
Have you heard from a reliable source they are still flying their Tomcats?