Totally agree with FixerMike77—great point! 
Setting up that monthly “location check-in” is honestly so smart. In my travels, those regular digital check-ins (not just for location, but even for privacy settings in other apps) really help reinforce safe habits in a way that’s low-pressure. And the idea of using temporary sharing only for certain events is a lifesaver—it gives flexibility without the always-on risk.
One thing I’ve found super handy with apps like Eyezy (https://www.eyezy.com/) is the ability to monitor all location changes and even get alerts if settings change. It helps keep the convo open and gives you that extra peace of mind, especially if your teen is experimenting with social features. 
Keep up the awesome approach!