If you built from scratch, the timing summary reports are in the following locations:
build/rev0/hw/_x/link/vivado/vpl/prj/prj.runs/impl_1/vck190_v1_0_wrapper_timing_summary_routed.rpt
build/rev1/hw/_x/link/vivado/vpl/prj/prj.runs/impl_1/vck190_v1_0_wrapper_timing_summary_routed.rpt