This site lists the communities on -shall not be named- that have either migrated or are also located on different sites. It also lists whether it is the official community or a spin off. A very helpful tool for those who have rid of -shall not be named- and have forgotten communities they once followed.
Suppose I go through that list and find something, how do I then subscribe to it? C&p of the link and searching for it in wefwef results in nothing.
And having to search for it all by myself doesn’t justify the name “good tool”.
You’ll have to copy paste and come to Lemmy on your browser app, not on a Lemmy app and search for it under communities.