Ugchcvtt
Sounds like the Ukrainian advance has come to an end today. Not much, if any, more territorial gains to come in Kursk.
The jig is likely up on this incursion, and to stay any longer to try and secure what they have will run the risk of another Bakhmut or Avdiivka - where the Ukrainian elite allowed their men to be force fed into a meat grinder in a forlorn attempt to hold the line. I doubt they'll allow that to happen and we'll see a retreat in the following few days.
What do the 'experts' think?
The Ukrainians threw up a big win and hit a good few military targets. As long as this can be continued at acceptable loss rate then they don't need to change anything.
We'll find out how Ukraine and Russia handle this over the next days and weeks. No one here would have predicted this counteroffensive so why speculate? So now to speculate!
If I was Russia I would dig in where they are putting in defensive works and not force any engagement -- the Ukrainians would possess a tactically worthless piece of land and suck up limited resources to hold it, whilst forcing the Ukrainians to have to use attritional tactics (if Ukraine wanted to carry on on the offensive) which would be too costly to maintain for a smaller military.
If I was Ukraine, I would quickly jink east and wreak mayhem into Belgorade oblast or west towards Belarus if the Russians were under prepared always giving an exit back to Ukraine. If the Russians were baited in and the defensive positions good then there's a big question about if it's worth to fight it out. Otherwise a retreat would be wise if attacking targets within Russia becomes more and more difficult.