Can anyone help? Why does the home tab on this app only show Ukrainian posts from Ukraine?

Is it possible to change what shows up in our tabs? I am trying to follow people I find, but the algorithms don't seem to find me. Why has the trending post for hours been a dog video?

Posts in "local" and "Federal" don't really have threads. It's pieces of conversations with no context.

Is this not like Twitter? How do I find threads on topics I like?