On Mastodon it is possible, when an instance (like Threads) is limited. Limiting is not outright suspending, and limited instance still federates, but its posts and users are not visible unless you explicitly search for them. Also, no one from a limited instance will follow you unless you approve them as a follower.
Plusy i minusy na Lemmym i /kbinie są dosłownie takie jak na Reddicie i Wykopie. Społeczność Lemmiego musi jakoś rozgłaszać treści, a to podpada pod „podbicie” mastodonowe. „Podbicia magazynowe” /kbin nie zalicza do podbić.
And the only region for whom the explore tab is working is America as nothing is localized.
Explore tab is sorted by language, not by region, so it works too for any sufficiently large foreign language country (Spain/Latin America, Portugal/Brazil, Italy, France, Germany, Sweden, Poland, Czechia, Russia, China, South Korea, Japan).
I wish Mastodon implemented Akkoma-style bubbles of related instances, which would allow to create, like, Explore tab but only from (manually selected) several Australian instances.
Vivaldi web browser opening their Mastodon instance brought me to the Fediverse. I started from Mastodon, but became curious of other fedi softwares - /kbin is one of them. I am on kbin.social as my Threadiverse instance in English since April '23, before Reddit API affair.