joel@fosstodon.org even in Mastodon "unlisted" simply means the "public" indicator is in cc instead of to. It does not imply that the content is private. Remember that this is why it's not even called "unlisted" anymore, but "quiet public".
NodeBB will see the post as correctly indicated by Mastodon (that it is public), and treat it as such.
cc finchhaven@sfba.social
Have you tried the open source one the French government released last month?
I can't for the life of me remember the name, it was something super generic. I'll see if I can find it.
liaizon@social.wake.st
Edit: found it, "Docs"
https://github.com/suitenumerique/docs
Not quite excel, so not what you're looking for unfortunately! Sorry.