Read this link please -->
Approve what kids buy with Ask to Buy - Approve what kids buy with Ask to Buy - Apple Support - Family Organizer receives requests by default, but another parent or guardian can be assigned permission.
Ask To Buy can only be turned on for members up to 17 (age varies by country - https://www.apple.com/legal/internet-services/itunes/).
If Ask to Buy isn't working If Ask to Buy isn't working - Apple Support
Try signing out of your account and back in again.
Try restarting your device.
Contact Apple and ask if they can tell you what this means, particularly if you see it repeatedly over a day or so:
Click here --> Choose your country or region - Official Apple Support Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
"See a list of Apple phone numbers around the world."
Click here --> Contact Apple for support and service - Apple Support