It was a clear handball from Feddal, but both the referee and the VAR official understood that it was totally involuntary, therefore it wasn't a foul.
Sergio Ramos didn't want to be bothered about the incident. Zinedine Zidane didn't want to show any real interest in it either. However, Butragueño did complain about the Betis defenders' handball.
It isn't that first time that Real Madrid haven't understood the criteria used by VAR to review decisions. If Feddal was the latest one, the Bernabéu still remembers the grab on Brahim away to Mallorca.
Real Madrid also showed their disagreement in a piece of play when Vinicius ended up on the ground against Villarreal. The referee didn't blow and VAR didn't reverse the decision.
Thus, Real Madrid still don't understand why some passages of play are revised from the VAR room. Especially when they see that Messi's goal, a penalty, came from a clear offside by Griezmann.