jointhefediverse.net seems to be a commonly linked resource for directing people to join the Fediverse.
Curiously, it does not list Lemmy under the list of Reddit alternatives. Their GitHub README explains why.
Previous relevant discussion: https://lemmy.ml/post/78808
You can select “All” instead of “Local” and you will see all instances that are federated with yours. (Not the ones defederated).
I wish we could do the same in communities that have the same name. “All” gaming and you could see every instances gaming community. Or select “Local” to see your instance only.
I actually use “Subscribed” because I don’t want to see posts from random communities. Haha…