Could a hypothetically big enough planet, with an earth-like atmosphere, be big enough so that you cannot see its curvature from above?

I want to know if a planet with an atmosphere identical to that of Earth could be big enough so that from no point in the lower atmosphere it would be possible to appreciate the curvature in relation to the horizon.

Essentially, I want to know if it's possible to have a planet so big it appears flat even from the highermost point of the mesosphere? The mesopause I think it's what I'm thinking about, as the limit to my question.

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Could a hypothetically big enough planet, with an earth-like atmosphere, be big enough so that you cannot see its curvature from above?

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