Different Spider-Man. They rebooted him.
Go big or go home with the final season, I guess.
I think the dumbest thing is the most they do with the mythology was in a youtube video. The Symbiote Sisters have, like, no context for their appearance otherwise.
Like they could have been mentioned before or have some kind of exposition and build up to them, but no, we're just going to randomly throw them into the show and hope you watched the video explaining their whole deal.