Star circles form all over above the Earth, because we only see part of the skies and stars at any point on Earth.
Except they don't, as clearly shown near the equator, where instead they form circles in a plane which intersects Earth.
And more importantly, in the south, we can see those circles, but they are around the south pole, not the north.
Why would that happen on a flat Earth?
If they didn’t form a circle over and over above you, and form circles above other areas of Earth, why would that happen above a ball Earth?
Because the orientation of the surface of a round Earth varies with location.

Truly simple.
A child could understand.
We’d see the stars move in the path we are on Earth, which would be different everywhere on Earth rotating in one path.
This depends on distance.
With a FE, with things circling 5000 km overhead, the distance from that centre of rotation is quite significant, and the paths should be distorted quite substantially around Earth.
e.g. if you look towards the north pole, you wouldn't see nice circles, you would see ellipses.
But for a RE, where the nearest start is ~ 40 000 000 000 000 km away, even the 300 000 000 km orbit around the sun is insignificant and wont change the view you get through your eyes or a simple camera.
So the face we see the nice circles around the celestial poles is already enough to show Earth is not a magical flat disc with the starts magically circling overhead.
Again, the sun and stars move above Earth in a concave position as they circle above Earth.
And by that do you mean that a given star is changing altitude all over the place?
Or do you mean that a given star is tracing a circle along a concave dome?
If the former, why don't we see anything to support that?
If the latter, that is circling in a plane overhead.