Yes, LG G7 Plus does have the portrait mode.
LG G7 Plus has 8MP resolution front camera and its aperture is f/1.9.
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.
Yes, LG G7 Plus does have the NFC support.
Yes, LG G7 Plus does have the 3.5 mm headphone jack.
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.