As a last resort, you can "Disable" the Play Store entirely. This doesn't delete it, but it hides it from the app drawer and stops it from functioning. Go to Settings > Apps > See all apps. Find Google Play Store. Tap Disable.
The most direct way to prevent the installation of specific types of content is through the Play Store’s native settings. This method allows you to restrict apps based on their maturity rating. Open the Google Play Store app. Tap your profile icon at the top right. Select Settings and then Family. Tap Parental controls and toggle the switch to On. how do i restrict app download android
Note that this can sometimes cause issues with other Google services, so it is generally better to use Family Link or a password-protected app locker. As a last resort, you can "Disable" the Play Store entirely
What is the of the device (Samsung, Pixel, etc.)? Find Google Play Store
If you want to restrict access to the Play Store entirely, you can use an "App Locker" from the Play Store. These apps allow you to put a password or fingerprint lock on specific applications.