All a child has to do is use Bing and change the search option limits to off, type in a targeted search for whatever filth they're looking for and Bing will pull it up. And if they use DDG, Brave, or some other somewhat "secure" browser, their search history won't show up in the browser unless the parent knows to go to Bing first, before opening up the history.

Most Gen X parents I know didn't know this until I told them. Which is weird, since we're the first generation to be raised with computers.