Why would Mossad be part of an operation that pointed right toward them?
I agree that "Five Eyes", MOIS, CIA, KGB, CCCP, etc might have been running an operation that superficially appeared to point at Israel.
Epstein was an independent operator and loyal to no one. He gathered dirt and put it out there for bid. He offered services to anyone who could afford it. Mossad is not above extorting even their own when needed to keep them in line. It is a Mafia, this is how a Mafia operates.