Toyota mobile app ignores to remind you that there is no sound. What's going on here?

The volume switch is not turned on. The volume switch of mobile phone is a switch to control whether the mobile phone has sound or not. If it is not turned on, the mobile app will have no sound. You should select the currently used profile, turn on the volume switch, set the personalized ringing mode to continuous ringing, and then select the priority number group in the profile as all incoming calls.