He had previous in the last couple of days mentioned that him and his husband were unable to find formula for their baby so the question likely came up again since he already had spoken out on the matter. I don't know the context in which it came up days ago. Perhaps it was in a more open ended "get to know" type of interview he was doing.

Biden's approval numbers are absolute garbage - I suspect he'll have a contested run in 2024 (or "voluntarily" decline to run) and all the sharks want to start getting their names in the headlines.