No, pull works too. Lemmy doesn't support it, but technically you can pull the topic and then step through the collection. PieFed does support doing that (although NodeBB isn't always consistent at providing a JSON response, likely due to a CloudFlare caching issue).

If you want to do a pull that Lemmy supports from NodeBB, you need to choose the first post in the topic, not the topic.

E.g:
https://browser.pub/https://forum.wedistribute.org/post/12

That just a Note (with inReplyTo null) that Lemmy will recognise as the equivalent of a Page.

Greetings, from elsewhere in the Fediverse.

It looks like https://forum.wedistribute.org isn't on the same NodeBB version as https://community.nodebb.org 'cos federation on there is broke in all sorts of exciting ways.

This message isn't a test of wedistribute's federation btw, as my instance will send this Note out twice - once to you direct, and once to the category (aka community) to send out to its followers, and the odds are that the direct version will get to you first.
This is something that NodeBB should also be doing, incidentally - both of us can send messages to this forum category without subscribing to it first, so Announcing content to followers isn't enough to ensure that everyone gets the relevant content.

Awesome. I also like NodeBB, and look forward to other places that need forum software implementing it too (particularly if they enable ActivityPub!)

It's not especially important, but a link to PieFed that's consistent with the links to Lemmy and MBIN is https://join.piefed.social/