Well, given what the site is doing I don't think they could really return all those status codes for the various pages and still show the images in all browsers. I think httpbin.org may be closer to what you're looking for

Also, I've been on the Internet long enough to know that there are unquestionably other sites misusing status codes, made worse by our graphql friend cheerfully packaging server errors in 200 responses

It returns it for 404 as well: https://http.cat/does/not/exist