I am interested in what your thoughts are about being in an echo chamber and getting out of it, but this is a great way to get a high level view of whats happening on reddit.
The concern of it being an echo chamber is one of the major reasons I added Twitter and I still look for more sources. For most of Trump's presidency some form of his name was the top trend 24 hours a day. Crypto is another trend, that while it's great for me because I'm interested in it as well, I question if it's really reflective of what the world is talking about.
I have considered creating some sub-sites as well to try and dig more. Focusing on subreddits for specific categories, but the Twitter api (at least what I can afford which means free) isn't quite as flexible for doing that kind of thing while staying inside my api call limits.
I'm very curious what each country is talking about. I made a little script that would show me what each country's subreddit was talking about but, the fact that it is on reddit means that its already biased. Maybe something where you use the the most popular source inside a country would be a way out of the echo chamber but the work in maintaining that I imagine might be a bit much.