(I think) At M15 we have the string section (minus the D.B.) play a quarter note slurred to an eighth. The chords start as a EbM chord, then transition to an Fm/D chord. Personally, I'd switch the 1st & 2nd Violins to add a consistency of rank, but that's preference and no one really cares (including a lot of famous composers) lol
However, those two chords play pp and staccato their last note of that measure. Because of playback it'd play more of a mf sound, rather a true pp. Even though they play alone, a pp still wouldn't be heard as closely due to the louder section play a couple measures before. Either a crescendo from a p, or mp would be sufficient to carry.
Finale, Sibelius, Musescore and a lot of other playback machines don't follow their dynamics to the instruments and capabilities, but rather the MIDI file that could be cleanly stuck on. One of the better VS libraries to come out solely for notation software that is being sold right now is Noteperformer for Sibelius.
Anyways, dynamics are really loose to an actual orchestra. They're not intensely followed, but providing close dynamics allows a smoother rehearsal for any performer and gives the sense that an individual does not need to wait for a conductor/director to give them their articulations and dynamics themselves.