Why Harry Franco and Harry De Haan didnt come into MCU mainstream before their death? they know Spidey's identity
Goblin, Ock, Sandman, Venom Topher.Grace, Harry Osborn, MJ, Electro, Lizard, Harry Amazingverse, Gwen Amazingverse, all of them know. But not all has been transported
Brock from SSU doesnt know anything but we can suppose the symbiote knows, that s why Venom has been switched