Getafe played very defensively at home today, so of course that has made it difficult for Barcelona to score goals. Lewandowski had several chances, so did Raphinha and several other players, but they were countered by the good performance of Getafe goalkeeper, Soria. I agree that injury problems meant that Xavi had to rely on a few subs to play an active part in the game. Pedri, Dembele and De Jong are still injured and of course that comes at a cost when the rest of the players are not at their best.
So far Barcelona have not scored a single goal in 3 consecutive matches including the second leg of the Copa Del Rey semi-final against Real Madrid. Their goalscoring faucet seems locked, so of course that leaves the Barcelona manager struggling to come up with a solution. La Liga is getting closer to the end, but if Xavi is still struggling to find solutions then I think his chances winning of title will be even lower.
Barcelona did not have a creative midfielder against Getafe, Xavi had difficulty rotating players due to injuries to Pedri and De Jong which affected the strength of Barcelona's midfield to dominate the match. Busquets and Franck Kessie didn't perform at their best in this match, so there weren't many measurable passes that could be given to the attackers. Getafe's defense was so defensive that it made it difficult for Barcelona to attack.
Barcelona's next match will face Atletico Madrid at Camp Nou, Atletico Madrid's record in La Liga is quite impressive, they haven't lost any of the previous 13 matches, the last time they lost was against Barcelona at home. This match will be even more difficult for Xavi if Pedri, De Jong and Dembele are unable to play.