While FX's Fargo TV show has nothing to do with the 1996 Fargo movie, the film actually did have an actual TV sequel – it just wasn't very good. While Fargo has always been synonymous with quality, with the four seasons of the FX show being beloved, that nearly wasn't the case. In fact, a Fargo TV pilot that was meant to serve as a sequel to the film was so bad that it wasn't even initially released.
https://screenrant.com/fargo-movie-tv-sequel-1997-bad-cancel/