Every Larian game so far was exactly like this, they always did early access for cheaper then went full price when it came out of early access.

BG3 was full price from the start, probably because of the money they had to pay WotC for licensing

Gamepass ultimate has the same thing, you can play games on their cloud servers, some are natively controlled, but for the good ones you need a controller.

My wife wanted to spend more time together, got the 8BitDo controller that holds my phone and I play games while she watches her stories. Works well.

Got an 8BitDo controller off Amazon, you can get a little clip for it that holds your phone. Best $20 ever. Kinda heavy to be gaming on the go but in bed it’s great