It's pretty trivial to have this reality be a 'container', as it were, within some superset reality, regardless of the information density of said contained reality.

Think of it like a human body sort of being its own unique, low-entropic thing.

I personally like thinking that in one sense, we're all a bunch of bits of fleeting consciousness on the edge of some fractal of realities, and the 'substrate' is simply possibility itself.

After all, the mandelbrot fractal is drawn by which series terminate, and often how long it takes them to terminate.

Why not us? Why can't we be one infinitesimal reality in the entire sea of possible realities, held together by the fact that our reality happens to have coherent rules that allows it to exist as some possible state in the greater states of some amorphous soup of possibility?

Just a thought. I know it may be more out there for some.