Not that I'm aware of

There are the statements made by the first DA who tried to prosecute Epstein, where he was told to drop it because he was "intelligence". Obviously, that doesn't specifically point to Mossad.

I recall there being something about finding passports and fake names, when the island was raided, that pointed in the Israel direction.

It's been a while since I've listened to or read anything about it, but I recall being convinced that it's the most likely scenario.