AsalamuAlaikum,
Hey Brother Muzi. What exactly is your question again?
Is it that other cultures speak of man being made from clay?
Simple Answers Allah sent messengers to all of mankind with the same message and with a revelation. High chance Allah mentioned Humans made from an extract of clay then it has reached us today but in a warped way.
Or is it people say Science in the Quran was already known at the time? For that i say bring the proof that it was known.