Sigh. Gravity is also a creation - one that can be measured and guessed at - but nobody from Einstein on down knows what causes it.
There are no accidents.
By E=mc² I’ve long thought of gravity like a “condensate” of matter that warps the spacetime around it. Elementary as it may seem, if there were no matter, there could be no gravitation...and hence, probably no universe either.
But I ain’t no physicist, and so could be completely blown out of their ballpark. Though it as yet makes sense to me.