As of my last knowledge update in January 2022, there was no information suggesting that Zinedine Zidane had plans to replace Erick Mombaerts at the head of the France Espoirs (U21) national team. Zidane himself addressed the rumors during an event in Marseille, stating that he was currently focused on his role with Real Madrid’s youth team.
Zidane expressed contentment with his responsibilities at Real Madrid and emphasized his interest in coaching. However, he indicated that he was not in a hurry to take on the role of coaching the France Espoirs. His comments suggested that, at that time, he was committed to his position at Real Madrid and was focused on gaining experience in coaching.
It’s advisable to check the latest and most reliable sports news sources for any updates on Zinedine Zidane’s coaching career and potential roles with national teams since the situation might have evolved since my last update.