For those of you having problems with “Failed to Connect” after scanning the QR code. I tried dozens of times with the same result of “failed to connect.” Finally, I noticed that the app would set my iPhone 11’s brightness up to 100% every time the QR code appeared. So when the QR code showed up, I manually swiped down the iphone toolbar and set the brightness down to a reasonable level before scanning the QR code. Then bingo, the camera connected on the first try. For some reason the camera doesn’t read the QR code properly at full brightness.
Wyze needs to fix their app with new phones having brighter screens. Going to 100% brightness will not work on some phones. They should also add this troubleshooting step to their support page.