It’s an interesting topic that reminds us that our knowledge and understanding are limited.
I believe in things that I experience but that are not amenable to the senses: self-awareness, free-will, right and wrong, etc.. Some people can not explain these things and consider them illusory. However I experience these things as much as I experience sight. When I experience something directly, and someone calls it an illusion, I conclude that they are rejecting valid data. That can’t be science.
Perhaps some insights are to be found in the “void” of space.
The Bible has much to consider on this topic. Comes down to God is stretching out spacetime in which we have our existence. Now consider the ‘latent’ energy of that expansion ... Like stretching a rubber band.