I think it is not possible for Real Madrid. Because finding alternatives to their main strikers may not be an easy task. Finding alternatives to Kylian Mbappe is not an easy task for Alonso at the moment. It may not be easy for Alonso to keep alternatives to Vinicius Junior and Rodrygo. Real Madrid already have Endrick and Gonzalo Garcia as alternatives to the main strikers, who may be able to meet Alonso's expectations. But I do not consider them as worthy alternatives to the main strikers yet. Xabi Alonso must qualify those alternatives or sign worthy players.
It is not possible to find a replacement for Mbappe at the moment. Last season was Mbappe's first season with Madrid. In the first season too, he scored 31 goals and 3 assists in La Liga. He also scored 7 goals and 1 assist in the Champions League. Vini and Rodrygo were important players in the Madrid squad. However, Vini scored 11 goals and 8 assists in La Liga. On the other hand, Rodrygo was only able to score 6 goals. So it is not possible for Alonso to find a worthy replacement for Mbappe and Vini at the moment. Very few players have the ability to score as many goals as Mbappe.