In an interview published July 19, 2023, William Arkin told Democracy Now that the US doesn’t have visibility into what Ukraine is doing because Ukraine and the US do not have a treaty:
The United States knows as little about what Zelensky is up to and what he he’s thinking and what his views are about the future as it does about Vladimir Putin and his future plans and intentions and so this might come as a surprise to some people but as my sources explained it to me the reality is that Ukraine is not an ally of the United States we have no treaty obligations