use https://federation-checker.vercel.app/ to check is the instance you are considering is blocked by others. and what the instace blocks.

please put the text of the article in the description.

no, it’s an app trick. not all apps allow it. it’s on the roadmap to be integrated in lemmy itself btw.

there is a bot that corrects the links, maybe we should improve that

there is an entire instance dedicated to that, use the lammy explorer to find stuff. be aware that your instace could have defederated from that instance.