The “Snyderverse” in context means the five film Snyder arc with Darkseid invading and the Knightmare ****. That’s not happening even if Cavill were to somehow return (and Cavill himself wanted to go in a different direction anyway). But WB has kept as many of the actors that Snyder casted as possible. Gadot and Maoma are still involved, Shannon is making a return as Zod, Miller is (currently) still the Flash, etc. Abandoning the Snyderverse didn’t mean abandoning Cavill until he refused to do the Shazam cameo. Affleck of all people has been given an opening to return for the Crisis movie per the leaks about Flash.

Cavill may still get to play a role, it will just be in a different direction from what Snyder intended. Everyone should just chill out and wait until Sat. If Cavill isn’t there then he’s probably done.