OK, so I’ve had a chance to look at this now. I don’t think you can completely reproduce that appearance at the moment, because Dorico doesn’t have any understanding that “Pult.” means “stand” and so know that it can show this just once when it generates a combined staff label for the condensed divisions. The closest I think you can get (unless somebody cleverer than me can prove me wrong) is to remove the group names “1 Pult.” and “126.96.36.199. Pult.” and instead name each of the divisions e.g. “1 Pult.”, “2 Pult.”, and so on. This will then bring back the “Violin 1” label centred between the staves, but when the divisions are condensed, you’ll end up with labels like “1 Pult./2 Pult./3 Pult.” instead of “1.2.3. Pult.”.
I think the only way we’d be able to accommodate staff labels exactly like the original score would be to make it possible to define a kind of common suffix for each division, and have Dorico know how to append that correctly when the divisions are condensed. We’ll think about this, but I wouldn’t anticipate that we’ll be able to achieve any change of behaviour here immediately.
Sorry that you had to wait 24 hours for a reply to this enquiry. I hope it didn’t inconvenience you too greatly, particularly since the answer is that you can’t easily achieve exactly the result you want.