Is there any reason I can't get the HMDI port upgrade for my Phantom 3 Advance and connect to my DJI goggles RE via HMDI? and if so what type of display will I have? Video only or all Info as on go app?

Per the FAQ page:
4.Which DJI drones are compatible with DJI Goggles RE?
DJI Goggles RE work with all the DJI drones compatible with the original DJI Goggles, including the Spark, Mavic Series, Phantom 4 Series, and Inspire 2.