Not saying it would be a success because when I played it I noticed it’s quite a middling game, but I’m quite sure it would’ve moved more copies if it released on all big platforms instead of on a subscription service.
Also, if you play the game put in on quality mode instead of performance, at least it looks like it runs at 29fps then. Performance mode is horrible.
It seems pretty clear to me that the game had no buzz at all (this thread is already bigger than the thread about the game!), which is why it hasn't sold. I would say that Gamepass is being unfairly conflated with poor sales (because people want to make that argument) and when you said "the Gamepass effect." That felt quite a lot like you were doing the same.
I would say that the game would have incurred bigger dev costs to port over to switch and ps, and the same lack of buzz problem would still be there.
Releasing a game with ok reviews isn't enough, it would seem. I'm not sure what they did for press and pr, but it seems to have got few reviews, barely any press.
In my case, I wouldn't even have heard of it were it not on Gamepass and even then, I don't think I've seen even a screenshot. As
UnsanctionedBuffoonery
says, even the terrible name will have put some people off (I was one of them!).
That's why I think that, Gamepass or not, this game wasn't going to do much business, but I also think that some people will jump on a chance to say that Gamepass is what made the difference, which is what your post appeared to be doing.