With the 3 bridges down, the 20K or so Russia troops west of the Dneiper are cut off from substantial supplies. They still have their makeshift rafts for now, but those too will be subject to HIMARS should they attempt to move any substantial materiel. But these rafts aren't enough to supply adequate artillery for the Russians to put up much resistance. Alternatively, they can try air drops, but given a lack of air superiority on either side, I think this wouldn't work.
On the flip side,
@volgr is right about one thing - Ukraine has yet to show the ability to mount a big counteroffensive. Most of the pundits I follow suggest they may not have adequate numbers of artillery or armored vehicles which seems plausible... but they do have the manpower and that number is increasing- unlike Russia.
I think both sides have culminated for now. But, I suspect Ukraine will find a way to eliminate the Russian troops west of the Dneiper. It might be a death by a thousand cuts for the Russians, but they are vulnerable and they will likely only get weaker over time. All in all, the Ukrainians always seem to just find a clever way to get it done.
I would like to think that the US and other western countries are willing to give Ukraine whatever it needs to have a successful counterattack and force Putin to come to the bargaining table. Otherwise, this war just goes on and on and on.
Which begs the question: What objectives are necessary for Ukraine to agree to a ceasefire... recapturing most/all of the land taken post-February, 2022 invasion? Retaking some/all of the Donbas or Crimean regions? Zelensky has stated repeatedly that the country will not negotiate until they get their land back, but is that realistic?
And at what point do the Russian people and/or the oligarchy surrounding Putin (i.e. everyone except Putin) throw in the towel? What event(s) would it take for the Russians to recognize that their "military exercise" is futile, and that Ukraine will fight to the bitter end?