It's strange to think he's still only 19, he seems older given he already made such a big impact a couple of years ago at 17 so people thought he would be a finished product already.
He's progress has been strange to say the least though, he started as a talented striker and seemed certain to be a great one but then has been gradually moved to the wing. He hasn't looked nearly as impressive there and just seems like the run-of-the-mill get the ball on the left wing, couple of step overs, then cut inside to either shot or play an average cross. It went to the point that Muller was playing as a striker rather than him when Kane got injured.
Bayern currently really lack a backup striker and Nkunku has struggled to settle from RBs two striker system, where he fit like a glove, to Chelsea's one striker system. Don't know how he'll a solution to the problem Bayern have right now.