That didn’t happen in some states.
It was strictly the states.
https://www.cms.gov/newsroom/press-releases/biden-harris-administration-issues-emergency-regulation-requiring-covid-19-vaccination-health-care
https://www.npr.org/2022/01/14/1072980412/the-supreme-court-delivered-2-decisions-on-vaccine-rules-for-u-s-workers