Ope you know what, I kinda sorta figured it out. I guess I was hung up and didn't do full due diligence. Turns out the popup stops short of appearing anywhere outside of the viewport when I run the game. However, my world that I want popups to appear in (in a fixed location) is 100x larger than the viewport. I don't know how to access the viewport, though.
I already have camera that follows the player, Edit: I just need to place able to place popups outside of the "main" viewport and still have them appear in that location