Perhaps little noticed (I only just became aware of it), there is currently an aluminum shortage.
The reasons aren't entirely clear to me, but it seems to date back to the pandemic, when fewer people eating out meant more people buying canned food for home consumption, well above the norm, so can manufacturers were caught off guard.
But why would it still be continuing today? Multiple reasons, based on what I've read.
One, demand for aluminum is increasing as hard selzers become more popular and more breweries reduce use of glass bottles in favor of cans.
Second, aluminum mines shutting down.
Third, reduced smelting of aluminum in China and the U.S. due to higher energy costs (and in China, reductions in coal imports from Australia) and in Ukraine due to war.
I haven't seen shortages of canned goods in grocery stores yet, but I've read reports of them. So if you see a shortage of canned cat food or empty spaces in the canned good aisles, that's what's going on.