You should be asking what is the objective.
Simple Russia is a federation made of Different Republics.
If Ukraine gets access to NATO or weapons are placed in Ukraine . Then Russia sovereignity will be tested and will didintegrate into many countries. Most of the resources are located in the Non Ethnic Rus.
Reason why U.S. moved eastwords for them disintegration of Russia means more business opportunities for Americans as they would establish their companies to manage the resources.
A big Miscalculatuion by Biden and the then SOS lead to them losing Crimea then which they had really eyed on to control Black Sea area of Influence. A miscalculatiin now will lead to a new Country which will act as a buffer between Russia and NATO.
Biden seema to have weighed his options . He is now talking of making a deal.
Its the best option he has.
Russia has hardly anything to offer the world apart form its natural resouces and weapons. That is the achiles heel of Russia. Too little local production. Russia imports almost all manufactured products. It would be damm for Putin to inavade Ukraine. Russia and Ukraine are brother states. Speak different languages, but the cultures, roots, religion are the same. Many intermarriages especially around the borders. What will Russia gain by invading Ukraine? Even the Russian on the street does not see the Ukraine as an enemy.