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You can set the Flutter Time Picker to show only AM times by adding the initialTime and selectableTimePredicate parameters to the showTimePicker() method.

showTimePicker(
  context: context,
  initialTime: TimeOfDay(hour: 8, minute: 0), // Set the initial time to AM
  selectableTimePredicate: (TimeOfDay time) {
    // Allow times between 12:00 AM and 11:59 AM
    return time.hour >= 0 && time.hour < 12;
  },
);

The initialTime parameter sets the initial time for the Time Picker to display. In this case, it is set to 8:00 AM.

The selectableTimePredicate parameter defines which times should be selectable by the user. We are allowing times between 12:00 AM and 11:59 AM by checking if the time's hour is between 0 and 11. This prevents the Time Picker from displaying any PM times.