Real Madrid is known during playoff, since this is a qualifier, I would say Liverpool will win.
There's nothing which make Liverpool in disadvantage, while Real Madrid lost so many players and they're not in good perform. With Ancelotti put the blame on Mbappe, this might create an internal conflict between them, that may affect their performance.
I think Madrid will come big in this match because they seriously need the match to actually make the top 8 of the competition and qualify automatically to the round of 16. A loss in this game will mean they will have to go through the playoffs and that is a longer route which might be tricky for them consider how slim there squad is reduce to now. Liverpool have a perfect record in the competition but that doesn’t make them unbeatable, Real Madrid in there days will beat any of these clubs but they are currently facing adaptation problem which from their last game against Laliga side Osasuna the team did show some improvement in their performances not only the because of the winning but the way they played together which is the most import thing
As for Mbappe actually not been performing well and Carlo Ancelloti calling him out that is definitely not true because the player has been in good relationship with the head coach and Carlo Ancelloti isn’t a manager that calls out a player due to performances or sort of that so this rumors are fake