Idk I feel like this sequel is not really trying to be all that serious, so everything is really just a microscopic lens of small moments. So I don't think it's here to expand and develop more beyond the ending if that's what people are expecting. Like these are true "extra" chapters vs. the trend where extras are actually better described as an epilogue.
Compared to the author's previous works I think it feels a little less thoughtful on approach with presenting the characters/plots. Now that there are 4 chapters it's bit directionless if there's some overall theme they are trying to get to at the end or even at the end of each chapter. So all I'm appreciating are the small snippets and extras of more interactions between everyone