Once there's a trainer, other Distributions are generally requested the same way as another trainer option as long as you're a Lifetime PLUS member and have 1000 RCs (request credits).
[Edited by Jaks, 6/10/2019 10:44:53 PM]
That doesn't help me make a buying decision.
As Pwiz has stated many times, if a game is sold on Steam, that's always CH's first version for a trainer. You can always request another distribution version the same way you would request another option for a trainer, then it would have to be approved at that time. The game comes out when....2020?
[Edited by Jaks, 6/12/2019 3:15:24 PM]
What he said, and wait for release, you will find out which platform it is for then.