pull down to refresh

Very good questions!
But if it's https aren't they encrypted?
The traffic is, but on all popular OSs (win/android/ios/macos), you have to manually configure encrypted DNS for your DNS lookups to not be in cleartext and the IP address that you're communicating with is too (and it's trivial to reverse-lookup) so your ISP can easily find out where you're going.
there is also maybe the risk that they are storing the packets until encryption is broken
There were some allegations that specific traffic, like all tor traffic, gets logged for later correlation, but I can't remember if I've seen direct evidence of that. Wouldn't surprise me though if that were the case.
But for the majority of traffic this wouldn't be feasible. I.e. an X post with 3 million views would be stored 3 million times, including all the megabytes of bloat surrounding the actual few 100 characters... Now imagine a 7GB youtube HD video. A Netflix series everyone binge watches... and so on.