I tried it with https://kutt.it, to no avail. Facebook checks the page it is redirecting, and in the case of https://lemmygrad.ml, the link created by the redirector also becomes blocked.

“I hold that it is bad as far as we are concerned if a person, a political party, an army or a school is not attacked by the enemy, for in that case it would definitely mean that we have sunk to the level of the enemy.

It is good if we are attacked by the enemy, since it proves that we have drawn a clear line of demarcation between the enemy and ourselves.

It is still better if the enemy attacks us wildly and paints us as utterly black and without a single virtue; it demonstrates that we have not only drawn a clear line of demarcation between the enemy and ourselves but achieved a great deal in our work.”

Mao Zedong. “To be attacked by the enemy is not a bad thing but a good thing”

The “lemmy.ml” domain has been blocked too, but it happened after Lemmygrad was blocked, because it used to work before.

This “https://bubble.ml” link is not blocked for instance, meaning that the top-level domain “.ml” is not automatically blocked, and that blocking both lemmy.ml and lemmygrad.ml was a conscious decision of Facebook.