Solar panel is not going work on a camera without a battery unless you also add an external battery.
Why do you say that? Sure they will. I do that quite regularly. It’s just a plain ol’ USB power source.
I have Wyze cameras in my truck that are powered from a cigarette lighter to USB adapter.
On MANY occasions, I have powered Wyze cameras from one of several USB battery banks.
I have powered Wyze cameras from high current 5V power supplies on top of my pixel tree in my front yard.
I have powered Wyze cameras from a USB port on a computer.