Nah, it's real I can assure you, and guess what, there are billions who see it cross the sky everyday & it's not a star at the center of the Solar System, it is a light with it's abode being in the firmament, do you know how I know this ? God tells me so.
I have even seen the sun in England, although we see it less often than in some other countries.
Seeing the sun (*) rise in the East in the morning, cross the sky above us, then setting in the West in the evening, allows us to work out that the earth must be a globe. Doubly so when you realise that there are times zones - while some places are experiencing the midday sun, other areas are in the middle of the knight.
* - when not hidden by clouds.
Yes, I have watched some YouTube videos that explain how the sun moves above a flat earth. The problem is that these explanations fail to explain how the sun can simultaneously be overhead for some people while setting for others and rising for yet others, all at the same time.
The Bible was inspired by God but it was written by many different authors over centuries, in their own styles, usually using normal language. Language is not literal even when describing real things. It is normal to describe things as they appear to the observer. As has been pointed out repeatedly by others, the Bible does not generally explain how things work. The sun and moons are lights and cross the sky. No explanation or detail of how the light is created or how they move. That is for us to discover.
The only documents that attempt to be completely literal are legal documents - which ironically are then very difficult for normal people to understand. So, you end up paying another lawyer to explain it, or an even more expensive lawyer to find some loophole or alternative interpretation.