But the user might only want to disconnect a single game and can’t was my point
Blizzard are the developer and publisher, so they run one clientID as they have on central source of truth, a users blizzard ID. So a unfair comparsion unless you are running a central user account system for all games, (Blizzard, paradox and others do this, central launcher, cental user accounts)
It’s not currently supported, unless your organistation owns all the games rather than the developers under you the publisher/top level developer.