If you just want to remove restrictions on one category, tap that category instead, select your desired rating, and then tap SAVE.

If the child is not yet 13, you won’t be able to completely disable supervision. [1] X Research source You can, however, disable Parental Controls for their Google Play Store downloads.

Tap the type of content you want to allow. Choose how much access you’d like the child to have to the specified content. Tap SAVE to save your changes.

This method requires you to delete your Google Play Store settings and create a brand new PIN to replace the old one. [3] X Research source