Since 2017, Wikipedia editors have compiled a list of news sources from which articles are highly likely to employ systematic bias, lack professional editing and/or journalistic standards, regularly misrepresent sources, and/or fabricate information.
While its list is by no means a complete list of publications with the aforementioned problems, it has helped make Wikipedia articles more reliable by basing them off of sources covering the same events and information from a less biased point of view.
To make Lemmy news communities better than their Reddit counterparts, I think avoiding links to those sources in favor of more reliable alternatives would be worthwhile.
Note that the sources on the list are there due to the frequent publication of misinformation, rather than their bias alone. As others have noted, the list can essentially be broken down into three categories: state-sponsored media outlets, clickbait-style tabloids, and extremist media outlets. The categories themselves are just a means of summarizing what's on the list though, as outlets in those categories that maintain editorial standards that disallow misinformation wouldn't qualify for inclusion on the list.