It's irresponsibly early to pretend to "analyze" this movement, but if we make the assumption that there is indeed a strategic offensive currently underway aimed at Zaporozhie, the likely Russian plan is to force UA to choose between (1) defense in depth of their garrisons along the eastern bank of the Dnieper River and/or their strategic depths between Donbass and the Dnieper; or (2) timely reinforcement of their primary fortified lines in Donbass

Either way, the Ukrainian lines in the east can expect to start getting rolled up from the south

RT: https://poa.st/objects/8474ae79-4b8a-4a6a-b842-c4434bd7f574