I had a similar issue where after connecting to the vacuum’s wifi, the app didn’t do anything after that. The phone indicated that I was connected to the vacuum wifi, but it didn’t do anything afterwards while on the iOS app. Eventually, I got it registered to my account on the Android app. Sharing this info below in case it’s ever helpful for someone else.
I have mesh wifi routers running Plume which have the same SSID / password for the 2.4 GHz and 5 GHz networks and they can’t be configured to different settings with stock firmware. I use iOS devices and to my knowledge, there isn’t a way to force my device to use 2.4 GHz instead of 5 GHz on iOS14 when connecting to a wireless network.
What worked for me:
Based on @ProjectBarks replies, I found my old LG Nexus 5 and had it connect to my wifi over 2.4 GHz (this could be set in Android under Advanced Settings; the choices were Automatic, 5 GHz, and 2.4 GHz). I retried the vacuum setup process a couple times on the Nexus 5 while on the 2.4 GHz network and on the 3rd try, the app did something after connecting to the vacuum’s wifi. I’m not sure if it made a difference, but I think that when it worked, I selected the vacuum’s wifi network in the Wyze app, then waited (instead of hitting the back button).
Good luck to anyone out there battling the same problem!