I've been calling out the similarity of works done by Barbour, Turok, Farnes & Petit for a long time, and the last developments by Turok's team vindicate this intuition. It is now very close to Jean-Pierre Petit's Janus model. Curt Jaimungal announced he'd interview him soon.

https://januscosmologicalmodel.com

Petit's models implies negative masses that would sit at the center of the cosmic voids, giving it structure.

Someone wrote simulation showcasing this emergent phenomenon a few years ago: https://www.youtube.com/watch?v=vtcbBpieR5U