For those of you, who like me want to disable all web-related images (e.g. you type in dog, dogs show up; the same for more explicit words), there is a way to do this! I kept trying to disable everything I could think of relating to search, siri, and parental controls, and then it dawned on me that these images come from the web. So you will use "Screen Time" in settings, set up a password for your kid or have a friend set a passcode for your own phone. Then "Content & Privacy Restrictions" > "App Store, Media, Web, & Games" > "Web Content" > and check "Only Approved Websites". Then, of course, don't put any websites in the list of approved websites. Merely checking "Limit Adult Websites" does not work.
Now, there was also a glitch for me after this, because it kept showing images. I went to Settings > Search > Search Engine, and my selected search engine was DuckDuckGo. I though "oh, DuckDuckGo might be allowing the images, so I changed it to google. The images went away! Thankfully, even after changing it back to DuckDuckGo and any other browser, the images no longer appear at all!
This is on ios 18.2.1. As a personal preference, I also disable Safari and the App Store in "Content and Privacy Restrictions" because it will not filter content from third party apps. If I need a new app, I have to ask my friend who has the passwors. Great accountability! I hope this helps.