Yep, you're probably thinking of https://en.wikipedia.org/wiki/Entropic_gravity https://en.wikipedia.org/wiki/Entropic_gravity and/or https://en.wikipedia.org/w

Yep, you're probably thinking of https://en.wikipedia.org/wiki/Entropic_gravity https://en.wikipedia.org/wiki/Entropic_gravity and/or https://en.wikipedia.org/wiki/ER_%3D_EPR https://en.wikipedia.org/wiki/ER_%3D_EPR, but there are other similar proposals as well. There's enough interesting connections between entanglement and spacetime that it's an interesting area to prod for sure.