The sun can't set on a FE where the sun is above the plane of the earth at all times.
Do you have evidence to back up this outright lie?
Yes. The evidence is that if the sun is a few thousand miles above a flat earth then you would have a clear line of sight to it at all time.
A statement made by some random contributor to this forum does not constitute evidence.
You should be able to model it on scale to back up your claim.
What would stop you seeing it?
Lots of things...distance for one, physical aspects of the aether for two, occluding objects for three...I could go on.
It would also change significantly in angular size, angular speed and luminosity throughout the day as your distance to it varies. None of that happens.
Just another baseless statement based on your inability to envision alternate and, certainly possible, modes of operation.
All that is in the context of the mainstream physics. You may have other mechanisms to explain this - EA, some magnification effect and I'm not sure about the luminosity one - the sun does admittedly change at sunset, but not during most of the day as it surely would if the sun was at a significantly different distance.
As I said, EA is a reasonable explanation. It's better than "perspective" which makes no sense at all. But it is at best a hypothesis, not a well formed theory.
"Mainstream physics"...joyfully uttered by most typical RE-zealots who visit this forum, as if they have any sort of grasp as to meaning.
You, of all contributors here, have the least amount of standing (based on the evidence of your posting history), to even include such a term in any of your posts.