For the wireless cameras, the WiFi distance in open area:
The WiFi cameras with external antenna &C1 Pro & C2 Pro: 80-90meters
Reolink Keen: 80-90meters
Reolink Argus Series: 70-80meters
E1 & E1 Pro: 70-80 meters under 2.4 Ghz Wi-Fi, 110-120 meters under 5 Ghz Wi-Fi
This data applies to environment：Unobstructed, free of interference
However, the WiFi signal can be easily affected by the environment. The actual distance you can get relies on your camera working environment.
And the key point is the WiFi coverage of the router, if the router cannot reach that far, I'm afraid the camera will not be able to work as well. It's advised to upgrade or relocate your WiFi router if you run into signal issues.