Not exactly what you want, but New Communities has people advertising newly created communities. You might be able to find something like what you're looking for there.
this post was submitted on 18 Jun 2023
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Pawb.Social Feedback
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An official community for users of Pawb.Social services (furry.engineer, pawb.fun, and pawb.social) to provide feedback and suggestions.
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There is a community search site at https://browse.feddit.de; it seems to have a broader view of communities than the community search on this instance.
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should work for the "community that tells you where another community is located"