InsideEVs is reporting on a possible new Model Y version showing up on EPA site. The more I think about it the more it makes sense that Tesla would make the Austin version of the MY an entirely new variant. That would avoid issues with different configurations coming out of Austin vs Fremont. Also, could allow Tesla to sell it at a potentially lower price point given the savings due to design (giga castings, 4180, etc.) and what appears to be a smaller battery pack.
We have just discovered an all-new 2022 Tesla Model Y version, listed by the EPA, which brings more questions than answers.