The developers of a game similar to Among Us would be forced to update the game with bots to be compliant?
I'm not a programmer or IT specialist or anything but I think the ask would be more like,
when discontinuing multiplayer service they must roll out an update to allow gamers to specify private server addresses
They don't need to program bots, they need to open the code enough for fans to keep the game functional. Like when I was a kid I could play multi player games with my friends by typing their phone number into the game. Our computers would connect through the phone lines and we could battle for the fate of Azeroth. I still remember the phone number of the friend I did that with.