I can't speak for Iowa, but there was plenty of Ammo available in January 2020. I was at two guns shows, nothing was selling in MN. The Poop starting hitting the fan in March, same time as the run on TP.
"In the early stages of the COVID-19 lockdowns, the media began reporting on a surge in firearms sales across the United States."
https://www.recoilweb.com/why-is-the...ne-162059.html