That's irrelevant. Who cares about that? This is just a red herring.
My whole post was to show you that Christianity believes they have the last prophet and present verses to show that, and in addition there are not verses as clear as you are demanding here that there will be a next prophet. Furthermore there is this:
In the Qur'an there were numerous stories about how people rejected past messengers, this verse says why those verses were revealed:
34. We have already sent down
To you verses making things
Clear, an illustration from (the story
Of) people who passed away
Before you, and an admonition
For those who fear (God).
Muhammad , "The Holy Qur-an", 24.34
Also these verses say that after in the Qur'an in a Surah of Hud there are several stories of the past where a prophet was rejected and the dire consequences for them when they were rejected.
100. These are some of the stories Of communities which We Relate unto thee: of them Some are standing, and some Have been mown down(By the sickle of time.
101. It was not We that wronged them: They wronged their own souls: The deities, other than God, Whom they invoked, profited them No whit when there issued The decree of thy Lord: Nor did they add aught (To their lot) but perdition!
102. Such is the chastisement Of thy Lord when He chastises Communities in the midst of Their wrong: grievous, indeed, And severe is His chastisement.
103. In that is a Sign For those who fear The Penalty of the Hereafter: That is a Day for which mankind Will be gathered together: That will be a Day Of Testimony.
104. Nor shall We delay it But for a term appointed.
105. The day it arrives, No soul shall speak Except by His leave:Of those (gathered) someWill be wretched and some Will be blessed.
106. Those who are wretched Shall be in the Fire: There will be for them Therein (nothing but) the heaving Of sighs and sobs:
107. They will dwell therein For all the time that The heavens and the earth Endure, except as thy Lord Willeth: for thy Lord Is the (sure) Accomplisher Of what He planneth.
108. And those who are blessed Shall be in the Garden: They will dwell therein For all the time that The heavens and the earth Endure, except as thy Lord Willeth: a gift without break.
109. Be not then in doubt As to what these men Worship. They worship nothing But what their fathers worshipped Before (them): but verily
We shall pay them back
(In full) their portion
Without (the least) abatement.
Muhammad , "The Holy Qur-an", 11:100
Also these similar hadith cited in the two most reliable hadith collections.
Abu Sa’id al-Khudri reported Allah’s Messenger (may peace be upon him) as saying: You would tread the same path as was trodden by those before you inch by inch and step by step so much so that if they had entered into the hole of the lizard, you would follow them in this also. We said: Allah’s Messenger, do you mean Jews and Christians (by your words) “those before you”? He said: Who else (than those two religious groups)?
Muslim ibn al-Hajjaj, "Sahih Muslim (Book 33-43)"
The Prophet said, “You will follow the ways of those nations who were before you, span by span and cubit by cubit (i.e., inch by inch) so much so that even if they entered a hole of a mastigure, you would follow them.” We said, “O Alláh’s Apostle! (Do you mean) the Jews and the Christians?” He said, “Whom else?”
Imam Muhammad al-Bukhari, "Ṣaḥíḥ al-Bukhárí",
These seems to indicate that Muslims will follow the Jews and Christians in all the mistakes they made. Obviously this would include not recognizing the next prophet.