currently, if i enter into the dynamic popover ff/mp, Dorico translates that correctly as ff/mp.
However, if I want to do mp/pp or mp/p, Dorico gets confused and displays only mp.
This has practical applications for how some orgs/people notate marching percussion (and how I have crossed that over to solo percussion) as [accent height/dynamic]/[tap height/dynamic]. For example, in a ff/mp dynamic marking, the accents are played at 15 inches and the taps are played at 3 inches. In a mp/p dynamic marking, accents are played at 3 inches and the taps are played at 1 inch.
I acknowledge that the latter is not the most common, and I assume that I can do some sort of text popover workaround, so I would classify this as a low-priority request.