We still remember how Zidane managed to lead Real Madrid to win the champions league for three consecutive seasons and I think that is a very difficult record for any coach to break. However, after that, Zidane began to be inconsistent and lost several titles with Real Madrid, be it the league or UCL, which made Ancelotti replace his position since the 21/22 season until now. But what is clear is that if Zidane does return to Santiago Bernabeu, I hope this time he will have a better strategy and tactics than before to make Real Madrid continue to win in league or European competitions.
Source: https://www.goal.com/id/berita/real-madrid-zinedine-zidane-carlo-ancelotti-la-liga/bltda68380b35396e2a
While Zidane was managing Real Madrid, he set a record that is hard to break, but we should not forget why he was sent from Real Madrid. You don't need to be an expert to reorganize and know that the team needs new strategies. New signings will also be required for Zidane to show his old performance.
Someone who has been very successful before may not always get good results when he is in charge of the same team. Maybe that's why he shouldn't return to Real Madrid