Spacetime is curved or the speed of light is variable or both.? the cyclic universe as result !!

Q-FFF theory says both are working together. so the Hubble redshift is more complex based on both systems leading to a cyclic universe ( like Roger Penrose suggested)

Both systems are created by

1: Faster lightspeed by elongated Planck Length between nodes, around all black holes ( also micro BHs)

Why, because all Nodes of spacetime fluxtubes, click at the same time moment of in the universe, to eject photon light at the same moment. (It would otherwise become a mess.)

2: In stable space,  with equal Planck length far away from mass and Black Holes, the speed of light seems indeed  constant.

see also: Einsteins variable speed of light. by Unzicker. see: https://twitter.com/unzicker_a/status/1538567701190389765