I’m not sure if Vince Gilligan and Peter Gould could figure out a way to have Jesse nonchalantly testing out a giant magnet (bitch), but that’s at least one option.
A second option would be to have him showing up at Gene’s Cinnabon, which would be amazing.
Now that El Camino showed everyone that Jesse Pinkman eventually gets to escape much of his dangerous past, no one has to worry about him anymore.
So Better Call Saul could provide the perfect opportunity for Aaron Paul’s final scene in this universe to be something completely light-hearted that has nothing to do with overdoses, Nazis, drugs or ground-shaking betrayals.