What about pics from space? I see the curve. I don’t think every country is making fake pictures. Also there are plenty of amateurs with balloons and go pros and I don’t think they’re part of some grand conspiracy either. Also gravity.
If they were serious they would crowdfund a cubesat and track it as it orbits the Earth. It was good enough evidence to prove that Sputnik was in orbit. You can even put cameras on the things so I'm sure there's all kinds of experiments you could do to verify that NASA wasn't faking it.