I don’t find the UN to be nearly the effective instrument it was envisaged to be when created. It has become a liberal political tool of coercion that often seeks to place nation states in vulnerable political positions.
That said, I think that every ceasefire to allow the sides (and their proxies!) to talk is an advancement towards ultimate peace, in whatever form that presents.
There is no “cookie cutter” approach to complicated geopolitical issues and only a fool would start planting place markers on what EITHER side should or should not want, or demand.
History has shown that war redraws boundaries. Whether that occurs this time, I don’t know given the animosity and global outrage at the circumstances on the ground.