Is the exterior wall of an existing property correctly executed?

Then the insulation was probably installed for this reason - cold exterior wall, where there was previously an "interior wall" to the neighboring house. If the building gap is to be filled, you may have to remove the insulation again.

If we assume that the building gap remains and thus the house wall stays exposed, are there any concerns from your point of view that should be mentioned here? Maybe any questions I should ask the owner? Or just leave it alone right away?

Can you still look out of the windows on the side wall? Maybe they were plastered over?

I find it very complicatedly described: Initially, it’s just a house with a poorly plastered wall! Then suddenly there is a construction gap, and it is referred to as a terraced house. It would be 6 meters, a missing middle house is described, but the other neighboring building is not shown. Now let’s be straightforward and show everything. Possibly also the offer as an ID in the real estate portal. My assumption: The adjacent building has probably been burned, the sides roughly plastered. If you’re interested in the house, take an expert with you, but please come with the ID (no link)