The “expanding space” story is phony as the “tooth fairy” story. It was invented only as an attempt to salvage Einstein’s 1905 “speed limit”.

The galaxies appear to be MOVING THROUGH SPACE, just the same as they appeared to be doing before the high-c galaxies were discovered. The same as they did in the 1930s, the 1940s, the 1950s, the 1960s, and the 1970s.

The “speed limit” of Lorentz, which is now attributed to Einstein, most likely applies to masses moving through strong gravitational and other fields. It most likely does not apply to large galaxies that are moving through empty space and are separating from each other and are not moving through any fields.

I don't know if a "projectile force" started the motion or some kind of "sucking" force or if some kind of outer "vacuum force" is pulling them, but "space" is not "expanding".