There's a Fediverse alternative to #Reddit called #Kbin. More info at https://kbin.pub
Still VERY new, not many servers yet, two so far in English:
https://fedia.io
https://kbin.social
No app yet, use it through these sites. Subreddits are called "Magazines". You can interact with magazines from other servers.
Coders help Kbin at https://codeberg.org/Kbin/kbin-core, non-coders donate at https://www.buymeacoffee.com/kbin
(Sorry to people bored of this, had many requests to put info in one place)