Both yes and no. It was a brief lack of available local stock from suddenly unexpected demand, followed by a lack of factories willing to stop doing well paid work to switch to making cheap masks, while we waited for even cheaper masks to get made and imported from countries with cheap labor, followed by a surplus of masks (source: a brief chat with a factory manager in my social network who was considering whether he could at least break even on costs and labor if temporarily switching to making masks)
Even then, there weren't enough melt spinning machines in North America to make the necessary raw materials, and the lead time on new machines was too long to address the shortage in time to respond to the needs of a pandemic.
