Hi Ray,
Unfortunately, we do not provide this kind of sample, it will depend on your implementation.
If you will use the TSI mutual mode or self-mode.You must merge the power manager and the TSI example.
For example: If you select the self mode, please look at the driver included in the SDK.
https://mcuxpresso.nxp.com/en/dashboard
The example is setting the TSI in the main function TSI_init(), also provide the key calibration TSI_keyCalibrate().
The Power manager example provides an API that let you configure the wakeup source. APP_SetWakeupConfig, you could select by a Timer or a Pin.
As you can see the TSI, has a Full functionality in most of the power modes that the MCU support.

Regards,
Mario