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 have the 3.5 mm headphone jack.
Yes, LG has already announced that Android P update is already in development.
Yes, LG G7 Plus is Qualcomm QuickCharge 3.0 compatible and also bundles a fast charger inside the box. The charger supplied with the box is of 9V/1.8A and a 30-minute charging session gets G7 from 0% to 40% charge.
LG G7 Plus has a high-end 32-bit Hi-Fi Quad DAC from ESS and is complete with DTS-X codec. Which means that the phone can stimulate 7.1 surround sound, which is the first time in a smartphone.
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.