What is the basis of the following theory that all the other Ambiya a.s. asked Allah S.W.T., for the position of Muhammad s.a.w.s. (pls see details):

You probably misunderstood the Mufti Saheb. The fact is that Ummatis of
Muhammad (Sallallaahu Alayhi Wasallam) have such a high status in the eyes
of Allah Ta'ala that a number of prophets of the past desired to be Ummatis
of Rasulullah (Sallallaahu Alayhi Wasallam).

Only Eesa's (Alayhis salaam) Du'aa was accepted and he will return as an
Ummati before the advent of Qiyaamat.

And Allah Ta'ala Knows Best

CHECKED AND APPROVED CORRECT: Mufti Ebrahim Desai