Simple google search.

Does space itself have energy?

Vacuum energy is an underlying background energy that exists in space throughout the entire Universe. The vacuum energy is a special case of zero-point energy that relates to the quantum vacuum.

https://en.wikipedia.org/wiki/Vacuum_energy#:~:text=Vacuum%20energy%20is%20an%20underlying,relates%20to%20the%20quantum%20vacuum.

Also, look up quantum fields. These exist outside of space and time and are everywhere. So space, even going with metaphor that it is mostly nothing isn't all there is. There is a whole other realm of stuff. The consensus is in physics is that the universe emerged from quantum fields.