Florian Wirtz seems like secured for Leverkusen for at least next season. Normally it wouldn't be much possible but Xabi Alonso effect changed everything for Leverkusen. They started to believe in themselves to achieve any title available. 
Therefore I also think Wirtz doesn't need to leave already now. He is only 21 years old as well so there is no need to rush while doing wonders with his team.
I see no reason for wirtz to leave from leverkusen at this moment. He can still play there under xabi alonso. There have been a rumor about real madrid to have an interest in recruiting him in the upcoming transfer seasons. Why desn't he wait for real madrid instead of join in the looser club? Leverkuen is also playing in the UCL next season. Therefore I also think Wirtz doesn't need to leave already now. He is only 21 years old as well so there is no need to rush while doing wonders with his team.He still needs to develop his performance in leverkusen. Im willing to see him to stay there for another season. It's been rumored that madrid will be keen to bring him and xabi alonso to the santiago bernabeu. I hope this gonna be real.
But in the summer of 2025, it seems like it will be very difficult to keep him. Real Madrid and Barcelona are already monitoring him according to rumours. As long as Leverkusen doesn't win the Champions League title I don't think he would stay.
No reason for him to leave at this moment. Real madrid has been reporting to recruit him as the summer transfer season of 2025/2026. It's clear that if wirtz shall stay for another season. It will be so good for him to know how good he is through playing in the UCL. Wirtz can leave only if he will win nothing next season.