I honestly cannot see Russia accepting anything other than Victory Gringo, you cannot have a super Power lose out to Ukraine, the only way forward is for Ukraine to concede on the ground taken by Russia.
It has been inevitable since day one, HB, that the only possible outcome of provoking Russia enough to fight them in their front yard would be Russian victory. The only valid question being, "What exactly does that victory look like?"
UK/US/NATO belligerence and continued escalations serving only to make that final victory/settlement even less palatable. Had they accepted the Minsk 1 accords in 2014 then all the death would have been avoided as well the catastrophic displacement of people and economic destruction worldwide. Ukraine would also still include the breakaway oblasts which are now never returning. They had a second chance to take this opportunity with the Minsk 2 accords which subsequently became an unopposed UNSC resolution. Instead they ignored these agreements, which is publicly admitted, with the encouragement/connivance of their western NATO sponsors.
Further opportunities to end hostilities (eg Istanbul) were also spurned by Ukraine at the behest of their NATO masters. Each time this happens, it just leads to the next set of conditions to end hostilities becoming more punitive for the Ukraine/NATO.
The ground already held by Russia being conceded by Ukraine is inevitable, HB. I believe that any settlement will go much further and include referendums in other regions who will be able to choose between full independence, remaining as part of Ukraine or rejoining Russia. Those that have already held referendums are Russian forever now.
Whatever is left of Ukraine will serve as a stark wake up call to the leaders of other entities that are currently being encouraged by western/NATO countries to instigate military belligerence against superpowers. I'm sure Taiwanese leaders being promised US/NATO backing are paying attention(amongst others). NATO promises and assurances are worthless. Being NATO's latest cats paw has suddenly become a much more perilous position. Ukraine's defeat is NATO's defeat. NATO's defeat is Empire's defeat.