You can already play on the Stadia controller , so I imagine that will take no effort to port to consoles.
It's not really a matter of effort that may end up delaying console ports, as much as the fact that Stadia paid a generous amount of money for exclusivity.
And if you are going to ask how do I know that Stadia paid a generous amount without knowing the specific of their agreement with Larian, the answer is that past months "indiscretions" revealed how Stadia paid insane sums to pretty much any studio they made agreements with.
