I noticed things are slightly different at Barcelona to how it was for Lewandowski at Bayern Munich. At Bayern munich he had enough support from his team mates, I must say I am a little bit surprised at his performance level at Barcelona, at the age of 34 I expected a decline in performance but he has managed to keep up and still scoring many goals this season. Barcelona can do much better if Usman Dembele and Raphinha can step up their game and make more contributions.
I agree with you, and still they have managed to be on Top 1 in La Liga. They are playing at the expected level, put they could perform better and settle a difference in points between then and Real Madrid if they coordinated more their game. But this way is also good, as there will be a fierce competition between both teams also.
His great interest in playing for Barcelona gives him more enthusiasm in my opinion, so he quickly gives his best for Barcelona. In the last season's transfer market, we saw how determined Lewandowski was to leave for Barcelona. It's something to appreciate what Lewandowski has given to Barcelona, even though it hasn't made any achievements for them, but his appearance gives a lot of hope to give something valuable.
I think Lewandowski wanting to play for Barcelona has nothing to do with his talents or skills or how he plays. I mean he is a professional who would play however he could, as well as he could anywhere he goes. The difference is that Bayern players got used to him, he wasn't this good the season he joined Bayern neither, but the more they got to know him, the more goals he scored.
He is not young anymore, but he is not super old neither, by the time everyone around him in Barcelona gets used to him, they would be able to actually give him the passes he wants and he would be scoring a lot more goals, or maybe it would be too late and he would get older before they get used to him.
His game as a Barcelona player isn't that much different from his game as a Bayern Munich player, as I believe in both teams he is the main man in the attack and the focus of the attack for the team. The most surprising thing about the player is that, even at the age of 34, he has been playing like a 23 year old player which is phenomenal at this stage of his career.
Furthermore, I would like to point out that his physique has been improving season after season and he seems to be fitter than he has ever been.
In my opinion, he will be able to play at least two more seasons at the top of his game.