Here are various documents you may find useful:
See how to 'Use Screen Time on an iPhone, iPad, or iPod touch' by clicking here --> 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 --> 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."
From: "Prevent in-app purchases from the App Store" --> Prevent in-app purchases from the App Store - Apple Support
- "You can control purchases on an Apple device in a few ways:
- If children in your Family Sharing group have their own devices, use Ask to Buy ( Approve what kids buy with Ask to Buy - Apple Support ) to screen and approve their purchase requests. However, "If a child redownloads a purchase, downloads a shared purchase, installs an update, or uses a redemption code, the family organizer won’t receive a request. "
- If you let children use your device, you can require a password for every purchase ( https://support.apple.com/kb/HT204030. ).
- You can also turn off in-app purchases entirely using Screen Time on your own device or a child's device."
Families and Kids - Official Apple Support
https://support.apple.com/families-and-kids