It seems completely impossible to get Dorico to output ANY sort of sane number for group of players like the following - you either end up with multiple (different) “1st Trumpets” simulatenously or the 6th trumpet player ends up being “Trumpet in D 9”. There is absolutely established universal practice here - namely that’s it’s the player that’s numbered, not the horn - and it’s completely impossible to get Dorico to do it, there’s not even an escape hatch to just manually specify labels.
Trumpets -
1 in F, 2 in F & E, 3 in F, E, & C, 4-6 in D.
Really this needs to be a per-instrument setting, as for instance dorico classes the Eb clarinet as just a transposition and not a seperate piccolo clarinet, but it shouldn’t be numbered with the soprano clarinets.