This reported breakthrough is not verified and likely did not happen. Other reports say the UA has retaken their positions and are using heavy air strikes in the area to repel the regular and newly arrived Wagner forces.
UA “using heavy air strikes” - sounds like UA will have to take that risk.
Weeb Union has an update that tempers the earlier report:
https://www.youtube.com/watch?v=rwNovu1ttzo
Now showing that a westbound break-through is neither broad nor certain, and not large, but a Russian force has made a narrow thrust. At 1:17 in the video - the central vector of 3 vectors, cuts the north-south highway.