

I don’t follow this topic regularly and I can’t say anything about the mechanisms. From a superficial search I would claim that there is good evidence that Tylenol use during pregnancy can make the development of asthma in the child more likely. There is also some indication (at least one large cohort study from Icahn medical school) that it may cause delayed language development.
That would be enough evidence for me to discourage use during pregnancy for treatment of discomfort or light pain, when safer options can be tried.
I just read the article from the German consumer organisation “Stiftung Warentest” about that, they write (translated with deepl):