Ok so you have to be in true vault hunter mode and a bit of the story is done(at lest till after you get on sanctuary) .. With controller 1 exit to main menu: controller 2 presses play then goes to the mode switcher: controller 1 can only be used right now you click normal mode then back to tvhm press circle : controller 2 has to click into game and it should shoot you up a few missions 🤷‍♂️🤷‍♂️🤷‍♂️🤷‍♂️ Not really sure how it works but It does.