if one were to analyse one row button accordion playing there is a limit to its possibilities[ no cross rowing for example] but there is considerable scope for right hand octave and or chordal work and or decoration.
the decoration could possibly have some similarities to both harmonica and other accordion techniques[ 2 different fingers for same button[ providing action is good enough]and using note above in same direction for ornaments, of course this may not be following faithfully in a particular style, but my idea of music is to discover and find my own way, but each to their own.