Abjad 3.19 works with Python 3.10 (and 3.11) and LilyPond 2.23.6 (and later).
Abjad 3.19 is a maintenance release that makes only the following three changes.
#1554: FIXED: duplicated dynamics corner case.
#1556: CHANGED: lexical position of \tweaks
in LilyPond output.
#1559: CHANGED: names of abjad.StartTextSpan.style
strings.