Hi
I think your perception , in my opinion, needs to be rephrased. It is correct that Muhammad is Khatamun Nabiyyeen as stated by you he is the last MessengerProphet, but he never said or Quran mentioned that “All prophecy of God/Allah ends here” with him. In fact, in my opinion, he himself prophesised that the PromisedMessiah would come here as one of his Caliphs in the end of times:
Dear Paar,
My knowledge about Islam is very limited. You have asked us many questions about our belief. Now, can I ask you a question. As far as I learn from my beloved Hajj grandfather (actually the brother of my grandma), that Muhammad is the last prophet. You agree that Muhammad is the last MessengerProphet in your word which I highlighted. Quran as you believe is the word from Jibril who dictated his message to Muhammad. Although Quran as you say did not stated that “All phrophecy of God/Allah ends here” with Muhammad, why do you conclude that there should be another ProphetMessenger after Muhammad? You should provide the explanation based on the Quran, should you not? Definitely not from any other person’s interpretation, including your ProphetMessenger.