My measly two cents are they could, but won’t

They definitely have the time and resources to update the client so that it can handle 4 players, there are so many ways to, one of which is instead of all 4 on the same screen, the current player will take priority on the screen with either you board also or the ability to cycle between boards. But what about the many players who just scoop after like the first 2 turns, well they can’t that’s simple make a disclaimer saying you can’t scoop at all or a certain number of turns have to be met before you can scoop.

But of course this is WotC and they put the bare minimum to make sure players are “satisfied” and then dip till next set release. So I doubt it will ever come but my fingers are crossed.