I have provided many quotes from the Fathers which show either they themselves believed in Globe Earth or did not consider it at all useful/profitable for our salvation. I have more that I can post too. The only quote out there that explicitly condemns Globe Earth is from Lacantius.
There is no absolute proof from Scriptures or Church Teaching that the shape of the Earth is this or that.
You did, actually. I failed to note that out loud. I too have more to post and while the subject is deeper than trying to find where scripture or Fathers say emphatically earth is round or earth is flat, we can certainly continue to peel this onion until the truth comes out. Scripture doesn't provide absolute proof, of that there is no doubt. But it does give us a canvas on which to paint a picture that shows what is true. Cosmas of Indiocopleustes, a 6th century Catholic monk at odds with pagans tells us that Moses reveals the form of the earth exactly as scripture describes: immovable, like a wax seal with upturned edges, with a dome, a face, four corners, pillars, like a tabernacle, and like a Church. The globe is incompatible with these. But further, the globe is incompatible with reason. The pagan's rotating, hurling ball through space with water attached has no basis in reality. It is a virtual world that defies logic. And beyond that, it has no basis in science or math. Compasses do not work on a globe. Neither do astrolabes, sextants, gyros, light houses or levels. Curve has never been demonstrated. The sun and moon and stars are misrepresented by modern science as well. With this much evidence something is afoot, we have a responsibility to revisit what we have been told.