These are all reports generated AFTER the protests in question, which appear to have happened in 2012. The company was fined by OSHA the following month. So unless she had a time machine these 2014-2022 OSHA reports could not have been part of any investigation she could have done at the time of the protests. Neither could the report about the violations they were protesting in April 2022, because OSHA did not make its determination until May 2022.
So the only info available to her was first hand reports of employees.
Supporters of Flex-n-Gate Unionization Rally at U of I Campus
will.illinois.edu
EDIT to add: Also, if you've ever read government agency reports on stuff like this, it's always in the most sanitized, neutral language possible. So reading a report and talking to people involved is always going to feel vastly different. I suspect if you're in the world of labor rights these kinds of things are going to feel particularly serious, as you're versed on all the worst examples of corporate greed causing real harm to employees. I think it's fair to be skeptical about the how serious this is, while also understanding that someone in that position can conclude in good faith that this is a big deal.