This game will be updated or was cancelled?
No Updates for now, but it's not close for the future.
based on their free Patreon on 11 august, they don't know. They love Angel Under but it's really time consuming and needed some funds so they made "problematics subjects" wich was a success, and they are surfing on this success until it's done. Annnd after ? they absolutely don't know if they'll come back or not, even if they love and would like to continue Angel Under. So... No Update for now, but it's not close for the future.