Streaming PC games to Meta Quest 2

I recently picked up an iPhone 6s and followed it up with some Meta Quest 2 goggles. I've been using Oculus Rift along with Steam streaming, but I've hit a snag. When I slide the phone into the headset, I can only see the center of the screen. Everything looks heavily zoomed in. We're clearly missing a step here somewhere.

Has anyone else tried gaming this way?