That’s kinda the point though. Math is a language inspired by reality. It describes relationships between things in an abstract format. Physical sciences like physics or chemistry build off it by adding rules and units to more accurately describe or predict real-world relationships, but at the end of the day, it’s all made up. Nature isn’t doing math to create a fractal any more than you’re doing math when you move your fingers or toes. Math doesn’t create a fractal, it describes it. You can then use that description to create a fractal, but the fractal isn’t math.