Since he is young is the main reason, he should not be patient on the bench because he wants to stay in Real Madrid. Playing in Brazil national team has nothing to do with which club that he should play for. Only Rodrygo can decide what he wants for himself currently. Real Madrid is always recruiting players every season, and I think that they might not need Rodrygo if he doesn't improve his performance in order to win a place in Xabi first eleven.
Xabi needs to be willing to give Rodrygo enough playing time so he can assess whether a player like him is good or bad, as Rodrygo's performance was generally quite good last season. However, if Rodrygo still wants to stay at Real Madrid this season, he should be given another chance to prove himself worthy of Real Madrid's ownership. Real Madrid could regret it if he moves on and improves elsewhere, while Real Madrid must also recognize that they are in dire need of more talented young players. Therefore, Real Madrid cannot afford to let go of existing players carelessly, especially if they are still very young.