Go and watch a boat leave at the ocean. The boat appears to go under the water at some point. If earth was flat it would keep getting smaller and smaller.
Eclipse. What is the shadow over the moon then? 🤣
That being said I'm all about conspiracy theories. It keeps life fresh.
Man, oh man, pal. You are behind the curve... pun intended.
The modern Flat Earth movement BEGAN when your #1 argument there was disproven. The Nikon P900 camera came out - it has 80X digital zoom - and people could watch a boat "sail over the horizon" and then use a camera to pull it back into line of sight. There's a visible horizon that is an optical effect. You DO have a limited range of vision.
And then look up a
selenelion. It's a
daytime lunar eclipse where the sun and moon are both visible above the horizon. Happens regularly. So that's a good question you ask. Is it even a shadow on the moon at all? Or something else?
Most people have never seen the
lunar wave phenomenon. It's a pretty recent discovery, first filmed in HD in 2012. You should look it up. The luminaries are much more mysterious than modern scientism would have you believe. We still don't know what the sun or moon are or how they work.