Ancellotti bought him from palmeiras to be developed as a striker but since we have seen rumor about mbappe will join in real madrid. It was threatening his career in real madrid, mbappe will also make endric won't get play time in the main squad like what he has imagined it before.
The come of mbappe is not only a good news for madrid but it's also another disaster for the young player like endrick which will try to develop his performance in real madrid.
The competition in real madrid will be even strictier and im doubting the future of endrick in real madrid. The good thing is palmeiras still wants him to stay and it's not too late for endrick to change his mind. Endrick shall re-consider his decision to go to the real madrid.
Even though he moved to the one of major club in the world and it means nothing if he will never get time to play in the regular squad. He wanna improve his performance but it seemed to me that is impossible for endrick to compete with other great strikers.
He will have same fate as arda guler which was very often sitting on the bench.
If Haaland + Mbappe went to Real Madrid then I would agree with your concern, but now there is no reason for it. Endrick will need to win competition from Rodrigo, Rodriguez, Garcia in order to play in the main lineup (paired with Mbappe), I think, given his talent, this is a completely feasible task for him. Given that he is extremely young and has huge room for improvement, he will be Real's first priority over their competitors. Plus, to be honest, if I were Endrick, I would even agree to be a rotation player for a couple of years just to train with such masters as Bellingham, Vinny, Mbappe and the rest.