How to stop asking parents for apps

To stop being asked to ask your parents for apps, you will need to turn off the "Ask to Buy" feature on your device. To do this, go to the "Settings" app, tap on your name at the top of the list, tap "Family Sharing," tap your name again, and then toggle the "Ask to Buy" switch to the off position. This will allow you to download and purchase apps on your device without needing permission from your parents. Please note that if your parents have enabled restrictions on your device, you may still need to enter a passcode to make certain types of purchases or download certain types of content.

Approve what kids buy with Ask to Buy - Apple Support