Something I've always thought would be incredibly useful, and it should not be difficult to do:
To have html/javascript run in a post. (If posted as one block in html tags).

It works in widgets so should be possible in posts, as html gets picked up by the browser
Why would this be useful ... is to have all sorts of interactive things! I currently have some one file mini games and utilities that I put in widgets.

Now, not sure how hard it would be to have activitypub also send html, so nodebb instances could share html posts between instances!
julian could Activitypub handle that?

This looks good.
Just my thoughts on Lemmy, I have various issues with it not federating well to various site at times. I mention this only if you encounter testing issues with Lemmy, more likely the issue is their side.
It has some good features but its frustrating as the instance I use appears to have issues at times!

Edit: updated as had to click into category to follow

@julian can you be specific in how to track it?
Although Ive found it I cant seem to follow / track that community.
What do I do? Apologies if Im being stupid, but Ive tried

The search worked, it found the community, but there was no subscribe option.
When I tapped the bar that says number of current subscribers an error page showed !?

This is very interesting, so how do I use it?
So to try it here - Is there a remote-categories area somewhere?
For instance if I want to post to @medicine@mander.xyz where to select this?

Just to say there are a lot of things NodeBB is getting right, in comparison to other Federated sites.
Mastodon is ok in some respects but when replies to threads come through the response comes in the feed alone and out of context. Nodebb shows the thread in World which is far better for following the discussion.
As for Lemmy, not sure if the instance Im on is not updated to latest version, but some things dont work well.
@Julian I only heard about Lemmy via you .. (Sometimes I wish Id never gone there lol)
It is good for searching, but its been problematic in other areas. Do you know who codes Lemmy and do they visit here, or is it someone in your federation network?

@julian I have upgraded to v4.2, but the world posts with no details came in before upgrade. I will keep eye on that as it could be fixed when something new comes in

Theres improvement, more in my World now on the tags Im following, but these posts all say by 'Guest'.
When Im looking at the same thing from Lemmy there is more detail?
Are some of the fields not being picked up?

If a site has a 'niche' theme and you want to find people with likeminded interests out in the Fediverse, the searching would be useful.
Correct me if I am wrong, but Mastodon doesn't seem to have categories, Ive only seen it on Lemmy.
In a way a category on Lemmy is like a nodebb instance, as most nodebb instances are for a certain area.
So one might argue that posting on a particular nodebb forum is akin to posting on a Lemmy category?

My first experience with Federation was with Calckey, (fork of Miskey.)
I liked some things about it, but there were forks of forks and I never knew in the end which variant of it was best to use

Yea, odd, I made a second account on mysite and that follows and unfollows normally.
So its a mystery why my first Admin account is doing it differently.
Maybe one day we will figure out whats altering the behaviour

Thanks, I tried unfollowing and following again, but its always the same.
On this instance it says following and my one it says 'cancell follow request' although the pop up box said 'You are now follwing etc'
I wonder is the difference because Im admin. It doesnt make sense why it displays differently

I followed mander@medicine.xyz from my account on this instance, and another nodebb instance.
This one shows Following, the other shows pending!
Follows dont need acceptance do they, why the difference?

That sounds good

I get your dilema about should it post in world or in medicine@mander.xyz
So if I want it to go in mander@xyz how to specify that?

Ok but I also referenced @isurg@lemm.ee and that didnt get a notification either

I still cant post into a community on Lemmy. Ive had more tries and looked at other posts which are going in. It seems they are directed in there somehow, not just by mentioning the group in the post.
@julian did you get any idea on this?

I know the initial brief was not for nodebb to replace other ActivityPub clients (like Mastodon and Lemmy.)
But theres some things Im not keen on in Mastodon, and Lemmy is annoying. Although good for searching, it is far from ideal in other respects.
So there is a gap in the market for a ActivityPub system based on Node (and not an exotic combination of other languages)
So, theres a good opportunity for Nodebb to fill that gap!

.. in medicine@mander.xyz group nothing arrived
There is a post I made earlier (using isurg@lemm.ee) but not this latest one from isurg@nodebb