Yup I was going through the configurator the other day and it wasn't there for the pro.I know that is is standard on the Lariat and above, but not available on the Pro.
I think the 312A for the XLT is also power up/down per this screenshot I took of the option when specifying the 312A:The power-up/ -down tailgate is standard for Lariat and Platinum. Power-down only for 312A XLT. Pro and 311A XLT are manual tailgate. The power tailgate is discussed and demonstrated in the "Discover Your Ford" video below (timestamp 36:05) It can also be manually raised as demonstrated in the video due to push button not working.