Ancelotti does not have to put him among the players who will take penalties, in fact, I prefer Bellingham over anybody else, if Vinicuis is unavailable, Bellingham should take the penalty rather than Mbappe. Mbappe has disappointed us several times, like he did against Liverpool in the Champions League, if Mbappe had scored the two penalties when Real Madrid was already behind, they may have fought to win the games. Honestly, I'm starting to regret Real Madrid's decision to sign Mbappe.
It's saddening to see Real Madrid donating penalty kicks to charity by giving it to the Mbappe. At first, I defended him when he missed penalty against Liverpool and give him a benefit of doubt because even the great players like Ronaldo do miss penalty at times but missing two penalties in a row in important games is too bad. I can't defend the indefensible, you either know how to do it well or you stay away from it.
The penalty taker should remain Vini and if he's absent, let Jude Bellingham do the work. It's that simple. I believe Mbappe will get use to Madrid as time goes on but Madrid want to make him adapt by force giving him penalties. Mbappe is not longer the problem but Ancelloti who still continues to give him confidence. How long will Madrid continue to sacrifice for him? They are gradually losing every points possible and they might lose more if they continue to flatter him.