Misskey is one fediverse software that can be used to host any instance. What you're seeing is one such instance. There are hundreds of others: https://www.fedi

Misskey is one fediverse software that can be used to host any instance. What you're seeing is one such instance. There are hundreds of others: https://www.fediverse.to/search/?sw=misskey https://www.fediverse.to/search/?sw=misskey