All pages on Kitsu got an unique Kitsu ID similarly to how it is on MAL and MU so the links should be able to be created with that. Idk how you made it so that just inputting the id for mal/mu on here created the link though, so if you need any special info for that to work I can try to find...
I'm aware that you need those roles to edit the pages. That's not what I'm talking about.
Just thought it would be nice to be able to add in some more sites as options to choose from when you're making the links. So its not only MAL/MU that you can choose from in terms of tracker sites.