On a purely pragmatic level: beyond philosophical complexities and existential insecurities, it does not actually matter whether mathematics is real and independent of us or if it is purely a procedurally self-consistent intellectual ecology of mysteriously effective principles, rules and axioms. Maths works for us. That is the crux. Personally, I think it has some kind of reality but this reality is never something which can be known beyond actually being known by someone (for it to remain at all intelligible, to be definable as being anything at all). It will look the same way to us whether we invent it or discover it; these are epistemologically identical to us.
Is mathematics actually real ? It doesn’t matter.