What does the double rectangle mean
What does the double rectangle icon on the iPhone control center mean?
iPhone 11 Pro Max, iOS 16
That is Screen Mirroring.
AirPlay – Enabled TVs and Devices --> Apple TV App–Supported Devices
I am not sure how were you streaming your iPhone Screen to TV on your iPhone XS --> How to AirPlay video and mirror your device's screen - Apple ...
You may look at this option too --> Lightning Digital AV Adapter - Lightning to HDMI - Apple
Next seek help here --> If you can't stream or watch films or TV shows from the Apple ...