~~~
I think the quality of both is good enough that they just need to show their professional attitude towards the coach's decisions. Because ancelotti is a coach who is quite experienced and he has strong instincts for the players he brings. So if you look at the quality of the Ronin he is a quality goalkeeper but it is difficult for him to get minutes to play. However, his performances in the two matches were good enough that Kepa's arrival gave a stronger impression that Ancelotti prefers Kepa character.
From that point of view, every player must compete to be able to get a regular place and that will probably become commonplace in a soccer team. Besides that, when the schedule is busy, Ancelotti can rotate the goalkeeper so that he can perform optimally in every match they play.
The competition to become Real Madrid's main goalkeeper in my opinion is not the most interesting thing to discuss repeatedly, of course, because in my opinion we already know the difference in the qualities of the two goalkeepers.
Ancelotti borrowed Kepa from Chelsea to become the main goalkeeper due to Courtois' injury. Meanwhile, Lunin, who incidentally is Real Madrid's second goalkeeper, will still be Ancelotti's second choice, unless Kepa has performed poorly in a number of matches. Kepa Arrizabalaga is one of the good goalkeepers so far in Europe, but I don't think Lunin has been on the same level as Kepa.