Mobile Router Control App: SIM Selection Functionality

On the iPhone/iPad (probably also Android?) mobile app called “Router Utility”, please add functionality to switch from one SIM to the other. We use the web interface to the routers all the time to switch between SIM A and SIM B as needed for different coverage areas when in our RV. The auto-switchover is basically useless functionality, so we manually switch, but it would be nice if we could do that from the app instead of the web UI.