I think the media is reporting Biden’s accomplishments accurately when they happen, however nobody is really interested. The news media (particularly on TV) thrives on controversy, conflict, and violence, even if they have to exaggerate. “If it bleeds, it leads”. Things working the way they ought to simply doesn’t drive attention.
I often joked during the 2020 election that Biden’s campaign should have been “Make Politics Boring Again”. Good governance shouldn’t make headlines. But there are some people who assume that if someone is out of the news, they must be irrelevant.