The Bible says nothing about evolution nor does it detail the creation of the universe. The Almighty God has every reason to hide his work behind nature so that we may only accept Him on faith. He did not reveal his handiwork so clearly as to make the Earth the center of existence, or to make it flat.
God used evolution. God used expansion. God created the laws of nature for a reason. The flat earth is NOT biblical, you are ignorant, and you are misleading God’s people.