As far as I understand , yes , it is an integral part.
I am not sure what you mean by multiverse.
Maybe you mean if a souls floats between physical dimensions?
If so, as far as I understand we have different selves in different dimensions, therefore we are in potential in other places as well.
The soul is a hyperdimentional unit and what connects us to everything. I think.
I recall the section of the wave that talks about the spider-like creatures, as representations of one possible future, which means that at that level, the soul manifests it potentiality in lower densities through dimensions, until we become aware of the illusion of division and these aspects come together at the realm border.
The wave discuses realm border crossing for more info on this topic.
Hope it helps.