wake.st is one of the many independent Mastodon servers you can use to participate in the fediverse.
the personal instance of Liaizon Wakest

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Server stats:

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active users

wakest ⁂

UPDATE: Looks like its a bit more complex (isn't it always)
So the CTO is here at @jsecretan and has clarified that they are in the process of implementing bidirectional , but in the meantime ingested the "federated timeline" of Mastodon.social
You can look at their AP response here: staging.maven.ly/mastodon/acto though it doesn't seem to be live on their main domain.