contacts during downtime

This guide has all of the information you should need in the section titled "Set communication limits on a family member’s device." If you have any more questions, feel free to reach out.

Set up Screen Time for a family member on iPhone - Apple Support

Is it allowing her to contact anyone during downtime? There should be a little icon under your name in the contacts app that says "🔒 Downtime Contact" if you have it set up correctly.

It sounds like you didn't set up downtime contacts correctly.