The phrase "Jinx 3 Chapter 2" likely stems from a few different sources of confusion:
Jinx Fixes Everything Act 2 guide - complete walkthrough - PCGamesN Jinx 3 Chapter 2
Recent creator notes indicate the main story is expected to conclude with Season 2 (likely around 100 chapters), followed by side stories and extras rather than a full third season. Confusion with "Jinx 3" and "Chapter 2" The phrase "Jinx 3 Chapter 2" likely stems
Creator Mingwa previously confirmed that Season 2 would be longer than the 53-chapter Season 1. Jinx 3 Chapter 2