There is a difference between providing it and promising it. The democrats absolutely can still promise a lot of very easy and populist shit. Meanwhile these same very easy policies are pretty much against everything Trump supporters stand for, very easy example most Trumpists hate student debt relief meanwhile Biden can just promise that, "fail" to deliver it and the cycle continues.

Majority backs student loan debt relief: poll(2022, slightly outdated but closest I could find)

Eighty percent of Democratic respondents support student loan debt cancellation, while 71 percent of Republicans opposed it. Independents were split, with 44 percent in favor and 42 percent opposed.

Student debt relief is literaly a 80% Dems in favor vs 80% republicans against split. The Democrats can easily promise and not deliver. Trump can't because their voters don't want it. I mean they do actualy want it but prefer to think as owning the liberal college students.

Of course the usual mechanics apply, the Dems love the opposition and benefit from being the both sides party i.e promise shit while simultaneously not delivering it to keep the capitalists happy and in control. Biden can lose obviously, but if this mechanic holds I don't think it will be that hard for him.