*The Bible doesn't teach that the earth is flat. Isaiah 40:22 says that God sits above the 'circle' of the earth. That's a round planet right there.
Revelation 7:1 -
After this I saw four angels standing at the four corners of the earthThe bible isn't
contradicting itself as usual, is it?

And circle of the earth can clearly be a flat earth because the flat earth would be a circle.