Here is an article written by Sean Jeans-Gail of RPA describing what is going on:
railpassengers.org

117th Congress Leaves Amtrak Board Nominees in Limbo | Rail Passengers Association | Washington, DC
Washington, D.C.—The Senate Committee on Commerce, Science and Transportation held an executive session today to consider Biden Administration nominees to the Amtrak Board of Directors, as well as the renomination of Robert Primus to the Surface Transportation Board.
