Black holes ( Dark Matter/High Mass objects) seems to lengthen the local Planck length around all dark matter small and large. According to Q-FFF Theory, this is suggested for the variable observed Hubble speed. Conclusion: the universe could be expanding and contracting at the same time. Even contracting after the Big bang into a Big Crunch. see also the Bouncing Universe.see,
The Alternative Origin of Hubble Redshift : Vacuum Absorption by black holes as a Support for Quantum Dipole Repeller Gravity and a Contracting Universe. https://vixra.org/pdf/1702.0040v3.pdf