How to respond to a reviewer request for "pictures of a real experiment" when my paper doesn't have experiments?
There are two obvious possibilities here.

The review says only irrelevant things.  In that case, simply respond to the editor: &quot;I was unable to determine the relationship between the comments of Reviewer 1 and the submitted manuscript.  Clarification would be appreciated.&quot;  The editor will conclude the referee did not read the paper and the review will be ignored.

The review is unclear due to sloppy writing or limited English skills.  In that case, I would interpret the comment as &quot;Add a graph displaying evidence that the paper is correct.&quot;  The response would be &quot;We have added a graph displaying y as a function of x, which supports our conclusion that ...&quot;


Also, when you are a peer reviewer, try not to give vague feedback.