One of the few advantages to using your camera manufacturer’s software is that they often show which autofocus point was being used when the shot was taken. There is already a plugin which adds this capability to Lightroom, but it hasn’t been updated since 2014. So, much of the today’s camera lineup is not supported.
With the author MIA, frustrated Redditor Joshua Musselwhite (AKA Whizzle) decided to write his own from scratch. As an underwater photographer, it was valuable information for him to have. So, he felt something needed to be done to support newer bodies. Joshua’s plugin is completely free, and at the moment it supports the Nikon D7200 and D800. He’s made the entire thing open source on GitHub, though. So, anybody can add new cameras as they wish.