Yes, I believe if Ukraine gave up Donbas and a land bridge to Crimea Russia would accepti t. Of course, I believe they would have accepted a lot less before the war.

The U.S. wants to bleed Russia dry, so they won't agree to that. Ukrainian nationalists might assinate Zelensky if he agreed to that. I see no end to the war in the near future because of all that. The only possibiity I see is if Putin leaves. But even then, hard to know where the rest of the Russian government stands on all this.