Breakthrough happened. Breakthrough in it's real sense that the RuAF units forced their way through Ukrainian lines, behind fortifications. Even behind the last fortified line which basically noone defends yet, since it's a line to fall back to.
At the moment not sure yet where the AFU can solidify the line. I believe for now they will, but they'll be less and less capable.
Also I'm hearing/reading Russian foot achieved this, in small teams, filtrated through. Ukrainians could only hamper them with drones, barely anyone holds the front.