It's been covered before but the truth of it is the US doesn't really have a whole lot left to offer at the negotiating table. What can we realistically promise? Withdraw from funding Ukraine's fight, stop providing up-to-the-minute intelligence data and satellite imaging, end all sanctions, unfreeze Russian accounts in the US, return money stolen from them, and invite Russia back into the banking system?
None of that is really all that appealing to Russia. They're winning anyway, so they're happy to watch us bankrupt ourselves funding the losing side of the war. They seem to be doing just fine despite Ukraine's access to "cheat mode"-level intelligence data. Sanctions didn't do much to harm them. The stolen money sucks, but they've partnered up with other allies and created an entirely alternative banking system (BRICS) that we're not invited to, so what do they care if we "invite" them back?
About all we can realistically do that would actually get Russia's attention is to whisper into Zalinsky's ear to make him shut up, sue for peace, and accept losing the territory Russia has already claimed. That would stop the fighting (if we actually did it) and appease Russia enough for them to call it a day. That's really all we have though, and Russia doesn't need it ... it'd just be a shortcut to victory that kills fewer people.