Np, happy to help. I had the exact same question a few days ago.

At the end of the page, theres a link named Instances, there you can see which instances are linked or blocked with the one you are using.

It’s blocked in your instance sh.it.just.works. Not in lemmy.ml. Each instance server has their own list of linked servers and blocks.

The one blocked in lemmy.ml is a troll instance name, it doesnt redirect to lemmygrad but to a pro trump one.