The Owl House. Though, given that it was cancelled and season 3 compressed to three double length episodes, I'd make the extra season a replacement season 3, and rework those episodes into part of the new season. There were definitely montages in those episodes where you could feel them practically saying "and here's several episodes we could have written, if we had time".
(Not to mention the infamous dialog about "maybe if we had time for 20 more adventures" near the end of season 2...)