The deal was negotiated with rail unions
For those who subscribe to this view, the rail labor dispute was a telling encapsulation of Mr. Biden’s approach: an instance in which the administration worked closely with many leaders of the dozen unions representing rail workers but
angered portions of the rank and file. Members of four unions voted down the deal that the administration had helped broker but were not allowed to strike for a better one.
Also, you seem to have missed the Obama presidency completely.
“For the decisions made in the Obama administration, labor was often an afterthought,” Ms. Shuler said. “It’s the polar opposite with Biden. We’re included at the table ahead of time, before decisions are made.”
Even the railway labor situation, in which Mr. Biden urged Congress to enact a contract that included significant wage gains and improvements in health benefits, ended up more favorable to workers than it probably would have under another administration, union officials say.
https://www.nytimes.com/2022/12/27/business/economy/biden-labor-unions.html