User Interface Question

In the tutorial videos, it appears the developer is working inside of an app, and the preview on the right side looks like a phone.

How do I get to that user interface? When I preview from Chrome, all I get is another browser window.

Thanks

What you see in the video is just me streaming the iPhone on my desk onto my Mac with an app called Reflector (https://www.airsquirrels.com/reflector), which enables you to receive Apple AirPlay connections – so the actual Preview app is still running on the phone.

Ah, ok, thanks. That’s pretty cool, I need to check if anything similar exists for Android (Pixel).

Reflector supports Android too, see e.g. https://help.airsquirrels.com/support/solutions/articles/11000043157-how-to-natively-screen-mirror-your-android-phone-to-your-mac-or-windows-computer