hahahaha she's taking credit for that huh

As other people pointed out, it is informally disregarded, and actually became a minor talking point earlier this year

But even with the changes, some 15 million people — many of them living in low-income communities and in the South — still have medical bills in their credit files, the Consumer Financial Protection Bureau reported. Rohit Chopra, the bureau’s director, said in a statement that “further reforms” were needed to scour medical debt from credit histories. The bureau is considering a rule to ban medical debt from consumer credit files.

The proposed rule in question is quite literally for that

The Consumer Financial Protection Bureau (CFPB) today announced it is beginning a rulemaking process to remove medical bills from Americans’ credit reports. The CFPB outlined proposals under consideration that would help families financially recover from medical crises, stop debt collectors from coercing people into paying bills they may not even owe, and ensure that creditors are not relying on data that is often plagued with inaccuracies and mistakes.

The CFPB bill sounds better than this garbage they're trying to attribute to Harris lmao, so either they didn't get all the details before trying to place it at her feet or she is trying to do something and it's even less substantial than this.