No, there is no evidence and the graphs were just Yandex search crawlers. Yet there are numerous anecdotes about far right accounts getting substantially less amplification and engagement in the aftermath. That could be just a mirage but it could be more than that. That would warrant a proper statistical investigation at some point. After all, the question if Yandex servers host parts of the Russian psyop system is a valid one, that won't be clarified by either misleading graphs, anecdotal stories or stories about how it was absolutely nothing, without offering any evidence for that either. Those big data centres were, from what I have read hardly just doing web crawler stuff.