Does this show Ibn Abbas (Ra.) belived earth is flat, or does this show previous muslims believed Islam teaches flat earth?

Ibn Abbas said : When Allah the Almighty spread out the earth over the water, it tilted with its inhabitants like a ship, so Allah the Almighty anchored it with heavy mountains so that it would not tilt with its inhabitants. https://www.islamweb.net/ar/library/content/132/3240/%D9%82%D9%88%D9%84%D9%87-%D8%AA%D8%B9%D8%A7%D9%84%D9%89-%D9%88%D8%A7%D9%84%D8%A3%D8%B1%D8%B6-%D9%85%D8%AF%D8%AF%D9%86%D8%A7%D9%87%D8%A7-%D9%88%D8%A3%D9%84%D9%82%D9%8A%D9%86%D8%A7-%D9%81%D9%8A%D9%87%D8%A7-%D8%B1%D9%88%D8%A7%D8%B3%D9%8A Ibn Abbas said : When Allah the Almighty spread out the earth over the water, it tilted with its inhabitants like a ship, so Allah the Almighty anchored it with heavy mountains so that it would not tilt with its inhabitants. https://shamela.ws/book/13607/61 There is a guy who is a flat earther muslims and he claims all the previous muslims believed earth is flat and he brings this narration among many, that this narration proves Ibn Abbas (Ra.) who was one of the great mufassarins believed earth is flat, cuz here he says when the earth was spread out over water it itlted like a ship, which doesn't go along with the idea of a sphere earth.