Is a Soul Awakening also more effective to apply white light to the past and have it spread through the future extensions, then the current and future life future extensions?

This is true as well, and a testament to your keen insight that the discussion of the quantum nature of time, being integral to the Soul Matrix work, will also apply to the other processes relying on effects transferred among time domains. And this implies then to the procedures you have been discussing now. So this confirms the logic you applied in deciding to consider quantum healing first in line for the description of the basic healing processes themselves in your course manual.