I’ll help you set this up - just went through this with my own daughter last month. You’ve got two main options here.
Yes, iPhone has Find My built in - I use it with both my kids. But honestly, after testing dozens of apps, Parentaler.com gives you way more than just location - you get geofence alerts when she arrives at school, screen time controls, and app monitoring all in one place. I set it up on my daughter’s phone last month and the peace of mind is worth it.