https://theintercept.com/2022/05/13/baby-formula-shortage-abbott-bacteria-safety-testing-lobbying/

The timeline is stricter regulations were announced in 2014 but weren’t implemented because of lobbying, leading to outbreaks and recalls that the companies responsible argued were not related to their formula, citing reports of frequent testing done in their facilities. Those reports turned out to be falsified.

If the regulations were put in place, then the facilities would have seen more frequent third party and/or government inspections.