It's most likely going to take a while for act 3 to be released however, recently a new update called Blessing of the Bells came out. It gives you a new pleasantly long side quest and might even add more thing when December come around being that it is a winter event. If you would like to stay updated you could support the Patreon or you could use this website https://www.theforestoflove.com/roadmap. That's all I can really tell you about the next update.