Is what's app end to end encryption is myth?

Web: https://www.reddit.com/r/privacy/comments/s2mw6x/is_whats_app_end_to_end_encryption_is_myth/

I saw some youtube blogger videos where facebook former employee are claiming that whatsapp end to end encryption is myth and though they encrypt the message before it leaves the phone, but they (Meta) figure out message patters before it leaves the phone, hence Meta will (atleast) have packet base user behavior data, to push more target ad or influence user in certain way. If anyone have more info on that, video, blogs, posts, could you please share that?

app encryption end end to end encryption privacy