Most people. Physics uses math to model the world, but is independent (math is not a science). At least we don't have any further evidence to say otherwise. There's a lot of interesting ideas around this in https://www.maths.ed.ac.uk/~v1ranick/papers/wigner.pdf and many of us believe that the universe itself is effectively an embedding of a large mathematical structure in a 3D-space 1D-time. But that would be effectively impossible to prove in any convincing way.