Real Madrid has the budget but they ran out of their main options, Mbappe mainly and Haaland also.
There is some rumours about Tchouameni, Dybala, B. Silva. I don't think there will be someone to take Benzema place at least for the next season but Real Madrid should find a substitute for him for the upcoming years.
Real Madrid were furious when Mbappe decided to stay at PSG despite reportedly having reached a personal agreement beforehand with Real Madrid. I think next season Benzema will no longer be like this season, he is getting older and the competition will be even stronger between Real Madrid's young strikers. So it's good to have a replacement for him as soon as possible because Real Madrid won't be hanging on to his magic for the rest of the season.