Wireless Android Auto or Carplay generally use BT to setup but WiFi to send the bulk of the graphical data over.

That said, there are adapters to make an existing Android Auto Wireless if you want it. I think some are sold on Amazon too so you could probably try and maybe return. I don't have any experience with them since I'm very happy with my car's built in wired Android Auto and the reliability of cabling but it is something you can try.

Thanks for the tip. I'll look into it.

I have one for my wife's car that has wired-only CarPlay. The dongle can do Android Auto as well. It has a bit of lag compared to wired or built-in wireless CarPlay (have used that in rentals) but it's not really an issue for usability. It was maybe $30.

Were they sold with an option to have have no OEM infotainment? Just speakers and a phone mount?

I don't think it has any OEM infotainment. I think there is some kind of software in there but I've never looked at it. It's not intrusive.

Looking at image search for "2020 impreza dash" there's a screen above climate controls in all images. I was asking if there was an option to have no sceen.

Backup cameras are required by regulation since the late 2010s. You can’t sell a car with no screen.

In some countries.

Oh, I see. I don't know. I doubt it. That wasn't something I was interested in; I use navigation very often. But it's my navigation tool, not theirs.