It's in the proceedings of the conference in July: https://www.workshop-proceedings.icwsm.org/pdf/2024_44.pdf

Proceedings are the publication part of conferences. Every conference paper ends up in proceedings, it is the only public conference artifact maintained after the conference ends outside of recordings of talks.

As I said, conference quality and review varies wildly and by field. In math, for example, conferences are more prestigious and no, it is not "easy" to just do a conference instead of publishing in a journal. This is also true in many computer science, statistics, and machine learning fields, which is vaguely where this might fall, as a soft application of the methods. The entire subfield in which they are publishing is a joke, so I do not expect anything about social media topic modeling or sentiment analysis to be particularly insightful or academically honest, but this actually applies to many fields with seemingly "rigorous" peer review, which is frequently a very poor filter. Many boring and redundant papers get published in major journals simply because they come from famous labs, for example. And good papers are rejected for petty or self-interested reasons.