Despite Deltarune: Chapter 2 being released by itself, series creator Toby Fox has said that his goal is to have Chapters 3, 4, and 5 arrive at the same time. Toby Fox shared the news on Deltarune.com ...
Inside the chamber where you start. After Sherry retrieves the weapons and reunites with Jake, check the corner of the room near the duct Sherry took to escape; the emblem should be quite visible.