What I see on WhatsApp:
"Messages are generated by Meta AI. Some may be inaccurate or inappropriate. Learn more."
Which leads to a pop-up further explaining that use cases include things like "creating something new like text or images".
I think it's going to be really interesting to see whether that's considered enough by courts, or if they'll take the position that these things pretend too well to be a real person to make such a disclaimer sufficient, similarly to how e.g. a brokerage can't disclaim "no investment advice" and then go on to say "but buy this stock, it's gonna moon tomorrow, trust me bro".