I don't think so. IIRC, railways need to provide access but not necessarily priority access*. Many Amtrak routes have less than 40% on-time performance, caused more by dispatch priority than actual congestion: following a freight train 100's of miles on otherwise lightly used track.
* Not technically true, but Amtrak cannot do anything about it. The Department of Justice would need to take action on Amtrak's behalf, and they never have.
This bill, however, would have given Amtrak some ability to force railways to cooperate with them on performance metrics by giving Amtrak the ability to sue them directly without DOJ involvement.
Text for S.1500 - 117th Congress (2021-2022): Rail Passenger Fairness Act
www.congress.gov