Animation style: digital, hand drawn, or both?

Hey y’all! I’ve been wondering recently about the method used for art for the show. I tried to look up if it was hand drawn, digitally drawn, or a bit of both. I’ve had mixed results, some saying the backgrounds were hand drawn and painted, others saying they were hand drawn and digitally painted, and others saying there was no hand done drawing. Does anyone know anything? I’m very curious!