If you're a parent in a family group, you can require family members to get your permission to purchase or download content on Google Play. Purchase approvals settings only apply to purchases made through Google Play's billing system.
Change purchase approval settings
If you're the family manager in the family group, you can choose purchase approval settings for any member of your family. If you're a parent in the family group, you can choose the purchase-approval settings for family members whose accounts are managed with Family Link.
Approve or deny requests
If you're a parent in a family group, you can approve or deny requests for content from Google Play.
When a purchase is completed through Google Play's billing system, the family manager gets an email receipt.
You can manage approvals for recommended apps that you download in Google Kids Space separately in the Google Kids Space settings.