Mechagon rings.. Help!

Hello. I have the achievement The Mechagonian Threat, and I just finished The Legend of Mechagon questline on my main, but I can't see the questline on my low level twinks. What am I missing here? I'm trying to get the BIS rings!

Did you look here?

https://xpoff.com/threads/mechagon-ring-guide.100313/

Also a couple posts down on this one:

https://xpoff.com/threads/mechagon-is-now-available.99638/page-3#post-1316394