Anything is possible, Jackson could go on to impress them and he gets a permanent deal. The way he's going to play at Bayern Munich Munich is going to be better than the way he played at Chelsea because he now knows, he really needs this move therefore his attitude on the ball is going to be different. He's going to take his chance and be more serious that I won't be surprised if he scores many goals. The team at Bayern Munich will be giving him better scoring chances since Bayern Munich are the strongest team in the league and creates the most chances therefore Jackson in the absence of Harry kane should get more chances of scoring and impress his new employers.
Anything is possible. Hopefully, he goes there and smash it. One game at a time, he should go there not to impress anybody, pick the right pass, do the basic, attack when necessary, pass and also defend and he will have the backing of the fanbase. The next few months are crucial for him if he has such intentions to remain with Bayern Munich. He can also be used as a back up for Kingsley Coman on the wing since a replacement wasn't brought in.