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You keep blathering on and on about "Church teaching" when the Church has never pronounced on the shape of the earth.
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Nor has the Church ever been definitive about the chemical structure of water, or the molecular weight of Hydrogen, or the solubility of amino acids.
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Get a clue.
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Every time the moon rises in the east it shows us the earth is not flat.
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We see the same phase of the moon from the north pole to the south pole, every day, 365 days a year. If the earth were "flat" that would not be the case.
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Scripture expounds in many places all kinds of ways about the form of the earth, always incompatible with a ball. Earth is described as a stamp under a seal, with pillars, having a foundation, a dome, with a face, breadth and width, four corners, celestials under the dome, hell below and Jerusalem in the middle. The Church also condemned the heliocentric model. If even the pagans are responsible for what they "don't know" because in fact they don't WANT to know, then yes, the Church has spoken. And if that isn't enough, its crazy peculiar that people insist everyone is walking upside down in relation to each other and that water surface curves to conform to the outside of a ball. For the childlike who discerns, that kind of circular thinking falls flat.
Then you say silly stuff like, "Every time the moon rises in the east, it shows us the earth is not flat" which doesn't prove earth is not flat, but that someone has not fully considered the the subject at all.