Ryan Broderick seems to have the correct take on Facebook changing their approach to content moderation:

I floated a theory of mine to Atlantic writer Charlie Warzel [..] that content moderation, as we’ve understood, it effectively ended on January 6th, 2021. [T]he way I look at it is that the Insurrection was the first time Americans could truly see the radicalizing effects of algorithmic platforms like Facebook and YouTube that other parts of the world, particularly the Global South, had dealt with for years. A moment of political violence Silicon Valley could no longer ignore or obfuscate the way it had with similar incidents in countries like Myanmar, India, Ethiopia, or Brazil. And once faced with the cold, hard truth of what their platforms had been facilitating, companies like Google and Meta, at least internally, accepted that they would never be able to moderate them at scale. And so they just stopped.

I stayed on through the last round of changes, but I'm approaching the end, I think.