It's not obvious how much of this is Sanders' impact on Biden vs. Sanders' impact on the party as a whole, but Biden's pro-union and pro-worker stances are pretty pronounced compared to Obama and Clinton (and remarkably so compared to Trump, and Bush). So he's easily the most pro-worker/union president in my lifetime, which is a fairly Bernie-ist position.
Same with (partial) student debt relief, and you see shadows of the Green New Deal in the Inflation Reduction Act.
