WhatsApp has had stories for years, just called statuses. Most of my American friends don't use it or know they're there, but my East African friends use them all the time. Frankly, most of my US friends aren't even on WhatsApp or Telegram or Signal. I don't know where they are :-D Maybe iMessage, Instagram, Twitter, TikTok, Snapchat, Facebook.
How do you define the difference between a messaging app and social media app? Many seem quite blurred to me.