There were some fan-made projects and online discussions about a potential season 12, but these were not official productions.
If you are looking for more Smallville content, you might be interested in:
* "Smallville: Season 11": This was a fan-made comic book series that continued the story of the show.
* "Crisis on Infinite Earths": This crossover event in the Arrowverse brought back Tom Welling as Clark Kent/Superman from Smallville.
* "Superman & Lois": This Arrowverse series features the adult versions of Clark Kent and Lois Lane, but it does not directly connect to Smallville.
It's understandable that fans would want more Smallville, but the show officially ended with season 10.