I have been using several Wyze Cam 3 cameras with scrcpy (Win11) to put 4 web cams in a window on my PC running Win11 using a Moto Z3 and it has been working great for years! I just decided to update the phone that I used from a Moto Z3 to a Moto Z4 and ran into a strange problem. Screen Copy (scrcpy on Win11) comes up on the Moto Z4 and works great with all the other apps but when I bring up the Wyze app, none of the cameras will load? I found that if I close scrcpy (on Win11) while the Wyze app is up on the screen and trying to load the 4 cameras and then I wait a couple of seconds and start up scrcpy a 2nd time, All of the cameras will have loaded and are showing a real time stream of video from the cameras but if for some reason I minimized the Wyze app and brought it up again they won’t be able to load the cameras again unless I kill scrcpy, wait a second and startup scrcpy again?
I am the author of this post and I was able to solve my problem. I started playing with “scrcpy” options and after I deleted the option for turning the display off (“–turn-screen-off”) then my cameras would load and I could get a live view of them. There must be something in the Wyze software that prevents the cameras from initially loading when scrcpy is using the “–turn-screen-off” option?
It’s been a while since I’ve played with it, but in the past I’ve used scrcpy 3.1 on Linux (Ubuntu/GNOME and Trisquel/MATE). I have never used the -S flag but see this in the usage:
$ scrcpy --help
scrcpy 3.1 <https://github.com/Genymobile/scrcpy>
Usage: scrcpy [options]
Options:
…
-S, --turn-screen-off
Turn the device screen off immediately.
…
Maybe the Wyze app doesn’t see a reason to load camera streams if the phone is reporting that its screen is off. That’s just a guess, though. 
I’m glad you were able to find a solution. Although I haven’t used it recently, I think scrcpy is a pretty cool tool.