No, none of KE series device has nano-edge pwm. But if high FlexTimer working clock can improve PWM performance, you can use KE1xZ and KE1zF. KE1xZ FlexTimer max clock frequency is 72Mhz, and KE1xF is 168Mhz.
If that is not enough, you can only select KV4x and KV5x. They are 3.3v device.