You are spreading misinformation. According to Mark Zuckerberg, Facebook actively buried and hid posts related to the Hunter Biden laptop story in 2020. We can argue about whether Facebook did the right thing based on the information they had at the time but let's be clear about the facts: the CEO literally stated that they did it, so it's not BS.
https://www.bbc.com/news/world-us-canada-62688532
Twitter's Vijaya Gadde also admitted that they blocked users from sharing the story. That's not BS either.