Justified: City Primeval star Timothy Olyphant has revealed the reason that Quentin Tarantino didn't direct any episodes of the new series. City Primeval, which premiered on July 18, is a sequel to the six-season FX series Justified, which was adapted from Elmore Leonard's stories about Deputy U.S. Marshal Raylan Givens (Olyphant). Although celebrated director Quentin Tarantino (who recently worked with Olyphant on Once Upon a Time in Hollywood) considered directing a few episodes of the series, that did not come to fruition.

https://screenrant.com/justified-city-primeval-quentin-tarantino-exit-why/