129 pages of FDA recalls over past 4 years. It is not a complete list and I didn't see any (not just covid) vaccine related entries. Various reasons including potency,labeling, microbial contamination, and packaging. One hopes this doesn't happen but it does ...

https://www.bcbsm.com/content/dam/micros....

I worked at a manufacturer of toilet valves. There were a couple of dies out of tolerance that ran for months and nobody knew. They did spot inspections but the deviation wasn't caught until water lines started detaching from customer's water valves. They never did admit anything was wrong and some data got lost after "lot analysis" showed the problem. I can see a potential for bad lots with the jabs, can't rule out data manipulation or loss, and don't ever expect the pharmaceutical companies to admit anything was wrong. At least you could sue the Valve manufacturer.