Please tell us how you got off Facebook? I think my daughter-in-law might decide to get our grandson off after she reads this thread!
Up at the top of your screen on the right either on your Homepage or on your Profile page, maybe both, there’s a function called “Account”. There’s an area in “Account” where you can opt out. It wasn’t on there when I first got into FB; but I guess people got to bugging them about it maybe. (I hope I’ve remembered correctly how I got out, but I believe this is roughly how I did it. Maybe someone else can explain it better than I can.)