[SHaEFU0i]

The article focused on dark energy and dark matter. The question that I'm asking is about whether or not the term added to the Einstein equation satisfies the symmetry of the vacuum. you cant talk about DM as no one knows what matter is
It is fair to say that in physics, there is no broad consensus as to a general definition of matter, and when scientist do disscus it they contradict each other

Different fields use the term in different and sometimes incompatible ways you are in search of science myths
science version of the unicorn myth