Yes, LG has already announced that Android P update is already in development.
Yes, LG G7 Plus does have the portrait mode.
Yes, LG G7 Plus does have the Corning Gorilla Glass 5 protection, on both sides of the phone - front as well back.
Yes, LG G7 Plus does support face unlock.
LG G7 has a display resolution of 1440 x 3,120 resulting into 564 PPI.
The LG G7 ThinQ comes with some very appealing features that include a Super Bright Display, a dedicated Google Assistant button, DTS:X surround and an incredibly loud speaker. It also comes with a notch which may not appeal to everyone but its powerful specifications and strong feature set make it a worthy contender.