Is there a way, without going to the source code, to check how the “explore” panel on mastodon, or the “discover” panel on Pixelfed, are generated.

I find it easy to understand my options for the feed on Lemmy - like “hot”, “active”, “new”, and independently “subscribed”, “local”, and “all”. I also like that I can customize it. Can I customize what I see on Mastodon/Pixelfed in a similar way?