I use the free website annotation tool hypothes.is to add comments to websites. Made for education, it can also “enhance” (for lack of a better word) public discourse. If nothing else, it makes you read articles more actively, like you’re engaging in a conversation with the author.
Example: https://hyp.is/go?url=https%3A%2F%2Fwww.theguardian.com%2Fworld%2F2021%2Fsep%2F22%2Fchina-climate-no-new-coal-fired-power-projects-abroad-xi-jinping&group=__world__