It is not only Facebook that is been block if you take the time to read the log you will see the NTP connection is being block too.

Do they have an android app? I mostly use my social media on my phone.

I was using Mastodon as Twitter as most of the people I used follow move there

Nostr? I never heard of that one , how active it is?

What I heard some people said about the fediverse was that before email was controlled by big corporations you can host your own email and no issues. Nowadays its much harder for a regular person to do this because big corporations took control of the federated email. So to my understanding even this social networks are in danger of the same thing happening. Please anyone correct me if I am wrong.