Try to install parental control on your phone, I can recommend the vkur1.se application, it has a very large functionality. For example, it can record all calls and SMS messages, as well as take pictures from the camera and locate the device. In addition, the application is capable of intercepting instant messengers as well as social networks. And installing and configuring the app is very easy, so there shouldn't be any difficulties.
I use the Google Family Link app for parental control, it is installed on the parent and child devices. From the parent, you can control everything, including blocking certain applications and putting the phone into sleep mode when the time limit is reached. I have two children and I can always see how much time I played and what application, where is it, and so on. You can also prohibit certain applications from using certain functions, or so that they work only after the administrator's approval. The device administrator is the parent device.
Method 1. Parental control settings in Android
To make the gadget as safe as possible for a child, just set up user access restrictions:
The child will be able to choose which applications will be installed on his desktop, but the parents will control access to them. For example, you can restrict access to the browser or assign a password to the Google Play store.
Method 2. Google Play settings
To prevent the child from downloading everything from the shelves of the Google virtual store, parents just need to enable the Parental Controls feature in the Google Play app itself:
After that, Google Play allows you to configure content filtering. Games, apps, and movies have rating limits ranging from 0-18 years. A checkmark in the "Music" section prohibits downloading songs with profanity.