No reason they can’t have “talks”, especially using lower level officials.
Or putin can just “declare” victory like he “declared” war
Millions of Ukrainians have ALREADY fled from their country.
When remaining Ukrainians freeze this winter, and experience food shortages more will flee from their country.
NATO is runnign short on ammunition and arms. US reserves of same are depleted. NATO is a paper tiger since Europeans spend lot less than United states based on GDP.