Could be regional, or something specific to TJs. My local Fred Meyer in Oregon has plenty of availability right now. Though the prices are a little bit inflated.

I literally just left a Trader Joe’s and I couldn’t find a single tin

Of course: they're all sold out to froufrou boogies!

Go to Aldi's, or better yet, Walmart, Kroger or a local large independent grocer.

> they're all sold out to froufrou boogies!

That's specious, Trader Joe's is cheaper than other stores for plenty of items