Is have the instrument Timbale (medium-low) for example that has 6 playing techniques (add to the playing technique library). It would be nice if there is a button to add all the playing techniques in once for the selected instrument.
I think I understand what you mean. You want Dorico to analyse your percussion map and automatically or with one “add techniques” button add them all in this menu. I fear this will remain a dream.
The trouble is that there is no real standard. Neither in the techniques naming nor in the note heads used for them. Each percussion library has a number of common names but also techniques specific for that library (like 4 different single hits)
On top of that there are the combined techniques. Even if Dorico could analyse your PM it will not know how you want to represent these as apart from the tremolo for a roll there are unfortunately no add on markers common for percussion.
What would be interesting to imporove. techniques definitions is to shift all percussion technique glyphs available on the right menu activated with the articulation input (shift+P). to the combined techniques choices in this menu.