No UNSC member state has put forward a motion that could pass. America's terms demand the return of all the Ukraine's former lands, and that can never happen of courseI don’t agree. But let’s say you’re right. Yiur position doesn’t really answer the question:
Why is the UN all about demanding a “truce” in the Israeli/Hamas fighting, but not demanding one in Putin’s war of aggression against Ukraine?
The UN you mention is its members and the motion for peace talks was approved by all members except the US. Britain could only abstain.
We can conclude therefore, that if America wasn't present, both conflicts would end.