But it's worrying if it's opt-out and not opt-in - even if they did prompt me to look at it when I first logged in after the added the Friends Discovery thing. Although the disclaimer suggests that for US users at least it might be opt-in, I honestly don't remember what the default was for me.
You can set it in your profile settings
https://imgur.com/a/Xp9LwqI
But it's worrying if it's opt-out and not opt-in - even if they did prompt me to look at it when I first logged in after the added the Friends Discovery thing. Although the disclaimer suggests that for US users at least it might be opt-in, I honestly don't remember what the default was for me.