This is the third big panic I've seen since I started shooting. I know it's more fun to make everything into a big conspiracy, but this is just like the others, a bunch of scared people (with a large influx of new gun owners) are buying everything they can get their hands on, and the production hasn't been able to keep up with demand. That's it, just like last time. The companies are not throttling, they're still going through the same supply chains, and the .gov is not blocking your box of 9mm from getting to the store.
Also like last time, it will eventually get back to normal, and when it does, remember what you ran out of and keep enough of that in reserve so you won't be as upset for the next panic (which will come). In the meantime, find other ways to kill the time you'd otherwise spend shooting or hoarding ammo, a nice day fishing is a lot more calming than reading online about how messed up everything is all day.