Israel and Greece even use the same dieselhydroelectric TKMS submarines (just Israel using a special larger version with special features).

Navy’s aren’t interchangeable.

Is real has many costal patrol ships and a few subs. The Greeks have a navy suitable for their archipelago waters

Israel could do Greece a favor send some IDF forces to play as the Turks and war game a land invasion on the Thracian border. It would be a useful exercise for Greece because Israel's infantry capabilities map closer to Turkey's than to Greece's.

Greece and Israel do a joint military exercise each year on the Greek peninsula. Mostly land and air forces.