I gather there are children involved (you have not said so)?
Read about how to use Screen Time on an iPhone, iPad, or iPod touch, in this Support article --> Use Screen Time on your iPhone, iPad, or iPod touch - Apple Support
With Content & Privacy Restrictions in Screen Time, you can block or limit specific apps and features. Details are provided in the article: "Use parental controls on your child's iPhone, iPad, and iPod touch" —> Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support
Set up parental controls with Family Sharing on iPhone --> Set up parental controls with Family Sharing on iPhone - Apple Support
- "With Family Sharing, the organizer can set up parental controls for children in the Family Sharing group. You can use Screen Time to manage how your children use their Apple devices. You can also turn on Ask to Buy, so children must receive approval for purchases or free downloads."
Approve what kids buy with Ask to Buy - Approve what kids buy with Ask to Buy - Apple Support
The Family Organizer receives requests by default, but another parent or guardian can be assigned permission to approve purchases.
Learn how to use the Find My app to share your location with friends and family members. You can even set up location-based notifications, so that you know if someone left a location or just arrived home. Refer to the document:
Find friends and share your location with Find My - Find people and share your location with Find My - Apple Support
Resetting a phone will only remove screen time if the phone is then not restored using a backup that pre-dates Screen time having been set up.