No one expects you to view social media all day. That are asking “did you see ___” because they want to tell you about it but first check you haven’t already seen it.
That's not how it goes. The conversations usually lead with them talking about something other people are doing, as if I have any idea what they are talking about. Then I ask them to explain the context. THEN they'll ask if I saw X on Facebook or Insta or whatever.