The bottom line is that there’s been absolutely no concessions from Putin. He’s doubled down on his maximalist demands of taking over the whole of Donetsk and Luhansk including the areas they’ve failed to win on the battlefield. I very much doubt this is going to change because it’s in Putin’s personal interest for the war to continue as long as possible, because without the war he’ll be toppled due to the dire state of the country.
The only way to end this is for the west, including the USA, to ramp up sanctions and military aid to enable Ukraine to finish the job. Otherwise it’s stalemate.
The reality is there’s absolutely no prospect of a peace deal or even a ceasefire because Putin doesn’t want one, and it’s been a huge gift to him to have a complete moron in the Whitehouse who he can easily manipulate.