When does Middlemost Post return?

Middlemost Post is an American animated comedy television series. It aired from July 9, 2021, to October 21, 2022. The 20-episode series is produced by Nickelodeon Animation Studio, with work being done remotely during the COVID-19 pandemic. The animation is done by Yowza! Animation in Canada.
Parker J. Cloud, a former raincloud, and his friend Angus, and pet walrus Russell deliver mail all across Mount Middlemost.