This anthology, or at least some of it, will be adapted into the new canon, maybe in the form of stories in a potential third From a Certain Point of View book
One of the Weequays from "The Great God Quay" was among Tessek's Weequay accomplices
Phlegmin wasn't the kitchen boy trying to poison Jabba over his brother
Bib's chapter implies that there is a much bigger kitchen staff and that plenty of them have grudges against Jabba.Barada betrayed Tessek and his conspiracy
He displays no signs of disloyalty towards Jabba or discontent with his job during his one POV section and Jabba did learn about Tessek's scheming somehow. Maybe Barada was the one who told him.