When no midi output is needed another workaround might be the use of the duration scaling function to offset one of the voices.
I love this solution!
And if you want some approximate midi output you can change the scaling factors:
\version "2.24.4"
global = {
\key c \major
\time 6/8
}
%{
*101/100added for first offset
*99/100 added for timing correction afterwards
%}
rightOne = \relative c'' {
\global
\relative c'' { e16 f f16*101/100 dis16 dis!16*99/100 e16 }
}
rightTwo = \relative c'' {
\global
\relative c''{ d16 g, g d'! d! g, }
}
\score { \new Staff { << \rightOne \\ \rightTwo >> }
}