It says "circle", not "sphere".
The Bible is not a scientific source and doesn't affirm or disaffirm physics.
It is he that sitteth upon the circle of the earth, and the inhabitants thereof are as grasshoppers; that stretcheth out the heavens as a curtain, and spreadeth them out as a tent to dwell in…The spherical earth is affirmed in the Bible. Never mind endless observation from our aircraft and spacecraft, and proven long before that by multiple circumnavigations of the globe in ships.
— Isaiah 40:22
You beat me too it!
He could actually use that verse to support it being flat. Isiah says a circle, not a sphere. They could argue the earth is flat and round. Geometrically it is a sphere, not a circle.
It says "circle", not "sphere".
The Bible is not a scientific source and doesn't affirm or disaffirm physics.