The last time I had major difficulty reconnecting a Wyze device to my LAN, it was an original Plug, and the key for me seemed to be turning off all of my 5 GHz Wi-Fi capability entirely (temporarily) in order to force the phone I was using to connect via the 2.4 GHz band that the device would use. If I was in your situation, I’d do a factory reset on one camera, force the phone onto the 2.4 GHz Wi-Fi band (by disabling the 5 GHz radios on the router and any other access points), and attempt setup. If that works, then I’d do the same thing with the remaining cameras and then re-enable the 5 GHz Wi-Fi service.
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