So I did a quick search for "union" in the #FAccT2023 proceedings, and came up with around 200 hits.
Less than 20 pertained to the actual concept of a labour union.
I dunno, am I the fool for thinking that if you are interested in organising workers to take power and accountability in oppressive processes and systems, that there's an obvious solution for that: Organising workers in unions and having a clear ideological line towards class solidarity?