In the WWI scenario, Russia was able to have a reprieve because the central powers had other things to do. So “appeasement” worked at least in the scenario where the opposition has multiple other fronts to contend with, and also when that would-be opponent ultimately lost. WWI was a lot more “gray area” so it’s hard to say what would have happened if the central powers prevailed, whether they would have decided to expand into Russia or not care enough to press that front.
For the opposite experience for Russia, see WWII where they started off with appeasing Germany and then got invaded two years later.
But again, the WWI Russian experience of maybe fighting in a conflict where they didn’t actually have a horse in the race doesn’t apply here, where the combatants are Ukranians, who have no option offered of just being left alone for the sake of peace. We don’t have US military being ordered to go in to fight and die in that conflict.
That’s the neat part, there are no good guys.