Lewandowski scored 19 goals in 35 matches last year, but this season he has reached 14 goals. This number of goals is quite good. Considering that there are still 26 matches left in the season, if he plays in 26 matches, he can probably pass the 30 goal threshold. However, you may be wrong about Mbappé. Mbappé is a very talented player and may explode later. He has only scored six goals so far, but he is a player who even has the potential to score a hattrick. If he scores a few hattricks in a few matches, he can be at the top of the scorers list.
The game plan of Hansi Flick most offensive make Robert Lewandowski become more aggressive in this season after success scoring 14 goals of 12 matches in La Liga and remaining 5 goals reach his goals scored last season.
I think difference tactician bring difference performance for Robert Lewandowski how easily in this season scoring goals for every match regarding his goal ration of 12 appearance.
Comparison with Mbappe goal seems not fairly because its first his season in La Liga and need time for adapting well, however the La Liga have many matches left and potential for Mbappe reaching Robert Lewandowski goals exactly Madrid still have one match remaining after postponed match in this week against Valencia.