As long as Vini, Rodrygo, and Mbappe are still around, they will have difficulty getting playing time. Because, we also know that Ancelotti is a typical coach who does not want to take risks in important matches, that's why Arda and Hendrick have difficulty getting playing time. Just look at when Real Madrid experienced a deadlock, Ancelotti did not include the two players. Moreover, currently in La Liga, Real Madrid's position is still below Barcelona, of course Ancelotti considers all matches as finals.
I think its because Madrid is not in good form currently. They're struggling and when you're struggling you cant afford to slip. If Madrid were firing other players too would be firing instead of just the top guys. Not giving players like Arder Guler a chance means you either don't believe in him or you're relying on the individual brilliance of the players.
I don't see a need to rush Rodrygo and Vini back from injury and always play them in every game knowing how important they are to the team. Endrick might not be that of a talent, but Arder Gular is. He has shown that he can play as a winger and an attacking winger.
Ancelotti doesn't give chance to players thought, except he has no choice. He likes to stick to the traditional. It took a lot of injuries in midfield and defense for Asencio and Ceballos to play, now look at how good they're playing. I belive a manager should find way to make do with what he has in a team like Madrid. This is a very crucial part of the season and the front 3 need to be kept fit and firing.