Short answers, pulled from the story.
United Nations General Assembly Resolution ES-11/4 declares that the sham referendums conducted in Donetsk, Kherson, Luhansk and Zaporizhzhia regions are invalid and illegal under international law. The resolution calls upon all states to not recognize these territories as part of Russia.
The United Nations General Assembly adopted United Nations General Assembly Resolution ES-11/4 on the 12th of October 2022. This adoption followed a series of events starting with annexation referendums held from the 23rd to the 27th of September 2022.
A total of 143 countries voted in favour of United Nations General Assembly Resolution ES-11/4 out of 193 participating member states. This represents 78.14% support for the condemnation of the Russian annexation attempts.
Five nations voted against United Nations General Assembly Resolution ES-11/4 including Belarus North Korea Nicaragua Russia and Syria. These five countries opposed the measure that demanded Russia withdraw from Ukraine.
Russia used its veto power in the United Nations Security Council on the 30th of September 2022 to block a resolution declaring the disputed referendums illegal. This action triggered newly adopted procedures allowing the United Nations General Assembly to convene and adopt document ES-11/L.5 instead.