Is there any way to search for questions that have a certain image in them? I am looking for a question that I got an image from, but can’t find it in search.
No. The stack exchange search is for text so you would need metadata embedded in to the image in the form of a where to URL showing the image link. That text would be easily searched for.
I would recommend tin eye reverse image search or another search image meant to classify an image. Hopefully they have crawled and indexed either this site or https://imgur.com/