You can enforce SafeSearch on Google Chrome using Google Family Link. This will prevent explicit images and content, such as sexual and violent content, from showing up on your kids’ Google Search results. Alternatively, there’s an option to create a blacklist and block specific websites or create a whitelist, so that your child can only access the sites you specify.
Other parental control apps, like Qustodio allow you to filter websites and search results by predefined categories. Qustodio has 25+ predefined categories, including Games, Profanity, Gambling, Pornography, and more.