If that’s a doorway then there’s no door, which is probably okay for a master bath. But based on the trim on either side, that wall is like an inch thick. Which probably doesn’t meet code and would also collapse if you bumped into it wrong. Plus in the shower door you see the reflection of the other part of the bedroom, you can see the corner of the carpet, which lines up with the reflection of the carpet in what I’m suggesting is a mirror. And you can also see the reflection of what appears to be the master bedroom window with either curtains or vertical blinds.

Edit: ok if picture 21 here is the same bathroom then yeah that’s a door not a mirror.

https://bringmethenews.com/minnesota-lifestyle/welcome-to-poundtown-on-the-market-wisconsin-home-raises-eyebrows-on-social-media