Is space expanding within superclusters of galaxies?

No galaxy, clustered or not, is currently being impacted by the force that is expanding the universe; this is because the galaxy's natural gravitational pull keeps it in its current state.

According to some scientists, the universe is expanding so quickly that at some point in the very far future, it will accelerate to the point where no galaxy can be seen from another galaxy. This means that whatever force exists will pull at the gravitational pull of the galaxies, causing them to expand until they vanish.

It is even predicted that in the end, this expansion will tear apart atoms.

Yes, just as space is expanding on larger scales throughout the universe, it is also expanding within superclusters of galaxies. This expansion is a fundamental feature of the evolution of the universe, as demonstrated by observations like the redshift of distant galaxies.