UV sphere that looks like it has quads. This is what it LOOKS LIKE. This is what you SEE.
It doesn't have a single quad. They are all tris. This is what it ACTUALLY IS. This is what is EXPORTED to Blockland.
Two planar tris that share an edge = Looks like 1 quad but is 2 triangles.
Two non-planar tris that share an edge = Looks like 2 triangles.
Actual quads.