This is a better question for the officials who run the stockpile in terms of how they deal with the surplus. Keeping the stockpile fully stocked with whatever levels they decide are necessary, that's their responsibility. How they would go through and decide what has expired and is not usable versus what perhaps can be repurposed, I'm not sure you have the right folks at the table to properly answer that question.
On April 24th, 2020. See this statement in context.