I think your questions are irrelevant since camera views were working fine before iOS app update but I will answer to my best.
Currently 3 homes. Our main home has 10 cameras, mostly viewing outside from windows. 3 our at my parents home in another state. Another is in another country (wife’s parent). All locations have fast internet.
All cameras have 3 bars. The 2 v2 cameras that has 3 second delay views are right next to the routers. The 3 v1 are also close. Again it is only the iOS app that is doing this. My android phone is fine for the affected cameras.
I have mesh router setup and it is hard to say which camera is attached to which mesh router but I guess at max 4-5 attached to one router. At parents houses one router with 3 cameras. Only camera with delay is v1. The other parent’s home has only one camera on single router.
We have 2 spare v2 cameras and these work fine on iOS even if we added these as extra cameras in our main home ( going from 10 to 12 cameras).
It is only the two earlier v2 cameras and 3 v1 cameras that we have that is showing the 3 second delays between frames.
The affected devices are iPhone 11, XR, SE (2020) - all with fastest processors. The android is a mid tier Motorola and it works great.
There seems to be an issues with the iOS app that Wyze needs to address.