I will be careful because I get this is your profession …
I would agree that the backfill process around these homes was probably not done right based on what is known today.
Go visit some cities and towns in heavy clay regions of the Midwest … moving walls back is relatively common and yes, the wall is reinforced with plates or beams to prevent it from “slipping” back out of position.
The wall I watched moved back into position was moved about an inch or maybe two on the top area of the wall. The wall has zero changes in cracks, etc… and there is no moisture penetration on the repaired wall.
The entire process is under the full direction of civil engineers (reviewed by an independent civil engineering company) and the warranty is long (maybe lifetime) and transferrable.
That said, I did not even know this was a thing until a couple years ago.