Pincho, you state that you view of the scale of galaxies as being sufficient patches of organized space and matter to satisfy the details of the mechanics of your theory, if I understand you correctly. You asked if the galaxies could have the same status in Quantum Wave Cosmology. No.
I will start from the Big Bang event in QWC. It is referred to as a big burst but in this discussion who is splitting hairs
. The burst releases a ball of dense dark energy. The characteristic of dark energy is that it wants to equalize its density with the energy density of the surrounding space.
The situation is that the dense dark energy is at the maximum possible energy density at the instant it is released, and the surrounding space is at the lowest possible energy density having just been mostly vacated by the formation of the crunch.
The dense dark energy expands at the maximum rate of expansion due to this extreme differential of energy density.
At that rate of expansion the dark energy fills a huge amount of space relative to the size of the initial energy ball in the instant after the burst. This initial expansion lowers the energy density of the expanding dark energy and the force of energy density equalization diminishes as the energy density differential declines.
The energy density declines to a threshold point where quantization of energy can begin. The earliest phase of quantization is characterized by the formation of dark matter across the entire expanse of expanding dark energy. The dark matter formation phase drains a huge amount of expansion energy from the dark energy and converts it to dark matter that has mass.
Mass and gravity begin at the same time in QWC and are directly related. The result is that the expansion momentum of the expanding dark energy is imparted to the dark matter as it forms. The dark matter pre-particles are all moving away from each other when they form. However, at those close quarters, gravity exerted by the dark matter is stronger than the expansion momentum imparted to the dark matter. The result is clumping of dark matter, the formation of particles, the rise of electromagnetic radiation, and the gradual formation of structure and a vast amount of hydrogen. The hydrogen clumps and the clumps grow and heat up and turn on as huge stars.
This is the first round of star formation in the arena. Huge fast burning hydrogen stars then form across the entire expanse of the expanding arena. Huge fast burning hydrogen stars soon burn their fuel and explode. These exploded first round hydrogen stars fill the entire arena with the remnants of dust clouds, radiation and stellar material including heavier nuclei. The landscape of the expanding arena enters a thermalization phase where the temperature of the background is equalized across the entire expanse producing a constant temperature in the cosmic microwave background.
Galaxies form from the gas and dust remnants of the exploded hydrogen stars. The galaxies are all moving away from each other because the expansion momentum of the initial particles that clumped into the stars has been conserved through the whole process.
So you see that in QWC the galaxies are the physical presence of the entire arena and the expansion momentum of the initial dense dark energy ball is now demonstrated by the separation of the galaxies and galaxy groups.
The expansion begins to accelerate because as the distance between the galaxies increases, the separation momentum of the galaxies increases relative to the gravitational attraction between them.
I hope that answers your question.