Website says there will be seasons 1, 2, 3 and 4
https://economictimes.indiatimes.com/news/international/us/silo-season-2-release-date-when-can-fans-expect-it/articleshow/111146916.cms?from=mdr
>> With seasons 2, 3, and 4 on the way, viewers can look forward to more revelations and immersive storytelling.
Don't know if it is true, but that's too much for something so useless and devoid of value as a stupid TV series.
It is also a dick move to always release these shows weekly, and even to skip weeks. It's just like a slap in the face to viewers who after all fund them.