How Can Jesus Emerge the end of time and pray behind a person who is not a prophet?

In the name of the Father., How do you say that the Prophet Jesus will appear at the end of the time, and that he will pray behind the person whom you say is not a prophet, and is called “Mohammad Al Mahdi? Isn’t this strange?!! How can a prophet pray behind a man who is not a prophet?

I will not complain about you to Allah

And I will not complain about you to Allah, rather my grandfather the Messenger of Allah pbuhap will do so, because he mentioned me in his will and mentioned my name, lineage, and attributes, and my fathers