My child’s texts
I purchased and set up my child’s phone with screen time controls and a passcode. Is it possible to download or see what she has texted and to whom?
iPhone SE (Gen 3)
Only by accessing the child’s phone directly.
(a good reason to restrict your child’s ability to change his/her passcode)
What parental controls ARE available are detailed here:
Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support