I saw an article before about a guy who reverse engineered the app and figured out default camera's admin password so probably possible but I think not worth the effort.
what I did was
- Installing the app
- Create a hotspot that provides no internet.
- Connect to that hotspot so now my phone has no internet
- Open tapo app and setup the camera
- Allow the camera to connect to the internetless hotspot to finish the setup and enable rtsp
- Uninstsll the app