Rather than itemize each separate model, we group them by series and leave it to thread titles to distinguish the various models with the group. For example, there's one prefix for the group comprising the 6, 6 Plus, 6S, and 6S Plus, and similarly one group for the X series.
After adding the other X prefixes, we updated the prefixes for the most recent 1000 threads, but we must have missed yours. Sorry! We've now fixed it.This actually lead to a lot of confusion in one of my topic. Because I selected X everyone just assumed I was talking about the X even though I specified Max in the discussion. I had to edit my post and change the topic to include XS Max to kept on track.
I know this is a one off occurrence, but it could impact others in a similar way.