I will say this one last time.
Space is made of, virtual particles and verging-infinitesimal places of atoms and particles of area and dimension; so a background sheet of energy particles exist potentially within the real physical vacuum of the spacetime continuum we observe dragging the far-by reaches of 4.5 billion light years away, where even matter itself is being dragged away faster than the speed of its constituents.
In other words, on a cosmological scale, the more we expand the volume, the more we have energy (that is, real energy) released into the vacuum (1). The more it expands, the more the potential energy $$PE$$ is converted into Kinetic Energy $$KE$$.
The fact the universe actually has an infinite supply of energy, (according to solutions of wave mechanics, such as the Dirac Equation predicting a sea of virtual energy), the zero-point energy field is now integral in part of the internal evolution of the universe, dependant of any Wheeler-de Witt equation of cosmological physics.
(1) - In fact i make a premise here and anyone who understands physics can naturally argue with me... volume and energy seems to have an uncertainty relationship. It may not seem surprising, since volume is given as density over mass, and as a consequence of having an undefined volume of the universe $$\Phi$$ (since its expanding) ** then more energy is created every chronon (or planck time) unto which everything unfolds.
**The uncertainty principle from this sense is very easy to conceptualize.