The middle USB is not a very good charger, and you have to use it to use Carplay and Android Auto. Everything except the FE have it.
Be warned though the port is much less than 1.0 amp. So your phone batter will probably not charge using it, if you use the carplay/auto.
That's what the TWO 12V ports are for, for 2.0+ amp usb plugs for charging.
To me this is just a flat out dumb design.