And it's not just RFK Jr saying it. The NYT and Forbes say it's true.
https://www.nytimes.com/2022/09/15/health/fda-drug-industry-fees.html
https://www.forbes.com/sites/johnlamattina/2018/06/28/the-biopharmaceutical-industry-provides-75-of-the-fdas-drug-review-budget-is-this-a-problem/