A 2D Spherical Example Consider a two-dimensional spherical surface upon which we have a collection of 2D galaxies. But because the sphere has expanded, there is now a greater distance between each galaxy. The further away two galaxies were at the start, the greater their separation now. This is the Hubble Law.
More expansion simply increases the effect.
Everything scales up equally, all observers see a Hubble Law with galaxies appearing to move away from them. But no galaxy is truly at the center of this expansion. There is no center on the surface of the sphere.