Hey all, first time posting here been member for a while mostly read.
The new transmission is a 9 speed ZF, so it won't be a straight over swap. It is nothing like the Frontier one as that transmission is for a RWD set up and the one in the Pathfinder is a FWD set up. There is lots of info out there already on this transmission, unfortunately it's had issues, Honda & Chrysler use this unit in their FWD base vehicles. Due to financial struggles at Nissan this was the most cost effective way for them to get a new trans by sourcing it from ZF.
The ZF units are heavily controlled by electronics so would need to have the correct software to manage how it shifts in relation to the engine or maybe even change out the computer control module? My youngest brother works for Nissan Canada and I can ask him if it is possible to swap and how easy it would be and the cost of course. He will actually have a 2022 demo to use for 2 weeks in April so I will get a chance to see it up close and also how it drives.