In 1994 Russia and the USA agreed to Ukrainian sovereignty and its borders in return for the Ukraine voluntarily disarming its nukes:

It was promised the USA AND Russia would provide the Ukraine adequate defense in lieu of giving up their nukes.

Which gives the lie to “Russia invaded because of impending Ukrainian NATO membership” - the USA & Russia already promised to defend their 1994 borders AT THAT TIME.

The USA and Russia also agreed in 1994 to Ukrainian autonomy and sovereignty, e.g. the freedom to join NATO and the EU if they want.

It is Putin that has broken his pact with the Ukraine by invading.

“

As the United States mediated between Russia and Ukraine, the three countries signed the Trilateral Statement on January 14, 1994. Ukraine committed to full disarmament, including strategic weapons, in exchange for economic support and security assurances from the United States and Russia. “

If the USA cedes Ukrainian territory to Russia in a peace deal the USA will also have broken its 1994 agreement to defend the Ukraine’s 1994 borders and its autonomy ( to join NATO if it desires ).