Perhaps this is Real Madrid tactic, who knows someone might panic and buy him, but considering Rodrygo inconsistent performance a €100 million price tag is indeed very high. In the last transfer window, Manchester City was willing to spend that much but they might not be so interested now. I think Real Madrid still desperately needs his energy, and he might stay at the Bernabeu for a long time, the problem is, in the current squad, Rodrygo doesn't always get a starting spot, which means he needs to move to another club to continue his development at his age.
Xabi Alonso does not consider Rodrygo suitable for Madrid's attack. he is still young & only 24 years old. On the other hand, 25 years old Vini is more experienced and capable of playing better than Rodrygo. So Xabi surely wants someone more skillfully and talented who will easily be able to contribute 15+ goals.
How Madrid management demands 100 million for for someone scored only 6 goals in his last season! ! Give me a single reason why would any club spend 100 million on such a player? You know only City, Arsenal, United and PSG have the ability to spend such a large amount but these clubs will probably not show any interest in Rodrygo at the moment. So there is 0 chance they could depart Rodrygo, maybe he will likely stay with Madrid one more season.