>Reading [1] for allegations against Facebook doesn't make any sense, because it isn't supposed to include those.

The quote from my previous comment was taken from the amended complaint ([3]) that you posted. Skimming that document it's unclear what facebook actually did between 2019 and 2021. The complaint only claims flo sent data to facebook between 2016 and 2019, and after a quick skim the only connection I could find for 2021 is a report published in 2021 slamming the app's privacy practices, but didn't call out facebook in particular.

Ah, sorry, the paragraphs in [3] I'm looking at are

21 - For the claim that there was public reporting that Facebook was presumably aware of in 2019.

26 - For the claim that in February 2021 Facebook refused to review and destroy the data they had collected from Flo to that date, and thus presumably still had and were deriving value from the data.

I can't say I read the whole thing closely though.