The ftm_simple_pwm example in MCUxpresso KSDK_2.2.0_TWR-K60D100M select PTA10 for FTM2_CH0.(...\KSDK_2.2.0_TWR-K60D100M\boards\twrk60d100m\driver_examples\ftm\simple_pwm)

PTB18 can also be used as FTM2_CH0 function.
Here you can refer:

Best Regards,
Robin
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