Well he has no option because as it stands now Real Madrid team is filled with competition and the even player isn't up with his game then the bench is probably where he is gonna end up.
IMO, this is not about competition but the regeneration of players in a big team like Madrid is really needed considering that the competition in the UCL will be tougher because the addition of participants provides a tight match schedule and Ancelotti just chose to get an alternative to replace Joselu with Endrick.Ancelotti recruitment of new players is actually for the future of Madrid, to maintain the quality of the team's performance and bringing in young players is the best way as a long term investment in the future.
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It is very likely that Endrick, the wonderkid, will replace Joselu role as Ancelotti second tier player and Endrick will appear more often in La Liga when Mbappe match schedule becomes busier.
Madrid is serious about bringing in Endrick as a replacement for Joselu, Madrid is willing to spend €60 million for the young player.
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Mbappe arrivals has caused so much hype for this Madrid team and the worse part is that their is not even 100% guarantee that he is gonna perform well because the game of football sometimes can be filled with suprises.
Indeed, no one can provide any guarantees, but at least Mbappe achievements and skills will not leave fans in doubt.