So what are in the boxes?
I went to the source (inspected the HTML code on the original page from X), and it's hosted on the PBS website. I tried zooming in, but there's just not high-enough resolution to make out anything. The blue paper sheet on the end of a couple of the boxes has the largest font size of any but some printed carton text, and it is not legible at all. Best I can make out on the clearer of the 2 blue sheets (the one that has 336 hand-written with a Sharpie) is a line that looks to say "EXP DATE", and "01/24". So, if correct that this is the expiration date, it's already expired by over a year.
NONE of the bar-codes are clear enough to scan, so the original X post challenging Coons' tweet is questionable, unless the guy found a higher-resolution photo.