No, there is no FIR against Imran Khan for the Zaman Park chaos. Imran Khan is a Pakistani politician, who is currently the Chairman of the Pakistan Tehreek-e-Insaf (PTI) political party.
The Zaman Park chaos occurred on 8th August 2020 when a crowd of PTI supporters gathered at Zaman Park in Lahore to celebrate the victory of Imran Khan in the 2018 general elections. The celebration turned into chaos when the crowd started throwing stones and burning tyres. The police had to intervene and disperse the crowd to restore order.
No FIR has been filed against Imran Khan in connection with the chaos at Zaman Park.