It would be a bit of a cheek realy for Zelenski saying to Biden hey you want this that will be 300 million dollars please now wouldnt it?Whilst the article mentions it a few times, there's no evidence to suggest that the Ukrainians will be giving it to the US, such as a quote from an official or similar etc. As it is now Ukrainian property I can't see them giving it (or any of the other bits they've captured) to the US without an agreement done before hand, either for cash or weapons etc.
I'd suggest that Ukraine would very much like to use these bits as a very nice bargaining tool to use against NATO/US with some form of payment being required before anything gets looked at!
They have had billions now from Nato so if the CIA want this Zelenski will happliy give it to the, for the main reason that the big wigs in USA will have far more succes in breaching its databases than the Ukranians with everything they have on their plate just now.