I can’t Find iPhone

If Find My was not enabled you cannot track it. If it is not powered on, you cannot call it to hear it ring. You will have to look for it the old fashioned way and that's track the steps your daughter took before she lost the phone.

This link provides advise on what to do if an iPhone is lost or stolen --> If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

Bellaguera wrote:

I can’t find my daughter iPhone how I can find it if the phone is off and find my iPhone is not on??

Sorry, then you have to find it the old fashion way, with your eyes.