Maybe a year ago. Most people are now back to work unless they can’t get supplies. A formula factory isn’t somewhere you can work from home.
I am going to take a guess and say that some of the ingredients come from China. China has been using their “zero covid” policy as an excuse to continue their low-grade economic war against the west. They know we are dependent on them, and they want the tariffs lifted among other concessions. So they play games with the supply.