There have been several news stories claiming the IDF lost 2 F35s, all coming from the Iranian news agency of course. That's not likely, the F15s would be an easier target and none of those were lost.
I'd like to see a few of the 20,000lb bunker busters dropped in succession on Natanz to see what they can really do. I don't think the IDF has the aircraft to drop that kind of ordnance though. We should fly in a couple of B2s to do it for them, seriously who would find out?