I don't see any forums under your account, but you can use the "Add" button in the box at the bottom right of the page. If you have a different account, login with it and you should see the option when you view your forum.

Bottom of the page to the right, under the "Toolbox" for your forum.

Thanks for your quick reply! This is a screenshot of my forum /f/testtesttest
https://endchan.org/.media/fcd91c0c1731c8476f17469fdc1c87dc-imagejpeg.jpg
I couldn't find it again... I missed it? Or is the screenshot different from what you said?
My environment:
Tor Browser 10.0.6 on Linux x64

Hmm, interesting. Let me look into it. Are you using the clearnet or .onion site?

Let me fire up TOR and take a look.

Strange. It should be there, I'm using the .onion website right now to post this comment. I see the "Add" button right next to the text, "Moderators" in the sidebar.

Can anyone else who has a forum check and confirm?

I was using clearnet when I posted the op. And then I also tested .onion
http://rambleeeqrhty6s5jgefdfdtc6tfgg4jj6svr4jpgk4wjtg3qshwbaad.onion/f/testtesttest
Same both, I couldn't find "Add" button. uuhhhhmmmm...

I tested another account. But same, I couldn't find it.

Per our private messages, I created a regular user account and created a test forum and attempted to add a moderator and was unable to. I'll look more into this.

For now you're free to PM me and I'll add whoever you want per request.

I still cant