And if so:

Can you use your characters on both platforms?

If the answer is yes, where did you buy it on pc? Steam? I bought it on XBox and might also buy it on PC if I enjoy the game in a few weeks.
Since MS Store on PC doesnt have PoE or PoE2 at all, I was wondering if crossplay between XBox and PC also works with Steam.

I believe from what i've read, you'd have to buy the beta in both if you want cross platform. I could be completely wrong.

I know that and I dont mind, I just wanna know where people bought it on PC and if it worked (well).

No one?