Assuming the weak strength of the opposing team is a big mistake made by a team. Barcelona and Real Madrid will not reduce the tension of their attacks in this match, especially Barcelona who want to maintain their position in first place. On paper, Barcelona can easily score three points from Espanyol, moreover most of Barcelona's main players are filled with players who have strengthened their country in the world cup. Even though Espanyol can make it difficult for Barcelona, the chances for Barcelona to win this match are very large.
After taking a break for more than a month due to the 2022 world cup, this season's La Liga is back on track. El Barca will face Espanyol at Camp Nou, but what is unique in this fight. the absence of Lewandowski, who received a red card, during the match vs Osasuna. We don't have any information regarding Barcelona's appeal regarding Lewandowski's red card. so, most likely Lewandowski will be doubtful to play in the match later. and if Lewandowski must be absent, who will replace Lewandowski. I'm sure Barcelona will find it difficult even though Espanyol is not a difficult team for Barcelona to conquer. Barcelona also have matches against Atletico Madrid and Real Betis, if Lewandowski's sanctions do not get a reduced appeal. certainly, it will be a loss for Xavi's troop squad to maintain the top of the La Liga standings.
So, do you think Barcelona doesn't have any other players apart from Lewandowski, so you assume it's difficult for Barcelona to score goals if Lewandowski can't be used? To be honest, I am surprised by your way of thinking like that, because it seems that you only think that Barcelona can only score goals because of Lewandowski, while Barcelona still have other players.
In fact, the Barcelona squad is currently filled with luxury players, of course, even though Lewandowski cannot be played, Xavi will be able to make a good rotation.
Unless this match is a final match to fight for a cup, then of course a player like Lewandowski is really needed in the match. But this is just a match against Espanyol, a team that is currently in the bottom area of the La Liga standings, which of course Barcelona will still be able to score goals and win the match.
What's more, this match will be played at Camp Nou which is a big support for Barcelona to play well, so whether or not Lewandowski is in this match, of course Barcelona will still win.