Arda Guler has a long-term contract with Real Madrid for 6 years and ends in 2029 so he has a lot of time to stay at Real Madrid and he can hone his skills as a professional football player if Carlo Anceloti gives him enough time to play because it's useless if he has honed his skills but has not used them on the field at certain times because that can hide his talent. Carlo Anceloti must believe in the abilities of the players he has, that the players he has have good potential.
Competition within the Real Madrid squad is very tight, so he must be able to prove himself so that he can be trusted more by the coach. I believe Carlo Ancelotti is a fair coach, he will give all players a chance, as long as the player can show something that can make them trusted by the coach. I think this applies to any team with a coach who is fair in assessing player performance.
He is still very young, so he has to work harder so as not to lose out to more experienced players. In fact, the intense level of competition should be a motivation for Arda Guler. The development he is currently showing is also good, because when he is given the confidence to play, he can play well.