More Black Holes means, diluting and eating the vacuum Lattice with a local Redshift result. ( Q-FFF Theory) Passing photons will become more red shift.
The longer the photon route, the larger the redshift, the larger the apparent cosmic expansion. see also: https://bigbang-entanglement.blogspot.com/2018/03/israeli-scientist-detect-signs-of-dark.html
Dark Matter Black Hole String Nucleus can split by small BHs, into equal Herbig Haro Bow-shock Chunks, Forming Stars and Galaxies in between, with S-Nova Dark Matter Black Hole results.