Instead of just searching the specific name of a sub what if I want to see every sub that's contained within an instance such as lemmy.world for example no I'm not part of lemmy.world but as part of the instance I'm a part of I can see every sub under it in a neat list can you only do that if you're part of the instance?
You can't see it from your instance because not every community will be pulled. A community only starts federating to your instance after someone on your instance subscribes to it
So is there a way to see those? A good example is lemming.online, which you can’t sign up for. The only alternative I’ve found is browse by new and just wait to see what communities pop up.
Lemmy isn't focused on everyone seeing everything but on keeping corporate interests and power tripping admins out. The idea is to encourage as many people as possible to run their own instance of Lemmy both to share the infrastructure costs and limit the power each instance holds. Keeping hosting costs down is why instances don't pull from communities nobody is subscribed to.
I'm not sure you exactly understand what I mean. I'm not saying I want to see everything ever just that currently I can type in I don't know bread or something and get multiple subs back that are related to that maybe and they're all listed as under a specific instance of course if I type something in and I notice like three or four subs from Lemmy.world or maybe other instances that are maybe more specific towards PC fixing or something I don't know I'm just saying I'd like to be able to somehow click on or see all the subs that I can at least see to some degree held under the umbrella of that instance just in a neat list so I don't have to know the name of every single sub that's in that instance because clearly it already knows this exist. Just want to be able to click on there and see the communities in a slightly easier way I can already find all the ones I can find just with a bit more effort.
So, from what I can tell anyways, it does seem like the original answer is what you're looking for. Each instance has a list of its own communities that you can see. You can also see a list of other instances that are federated to an instance by browsing to /instances (ex. https://lemmy.ca/instances shows all the instances lemmy.ca is federated with as well as which ones are blocked). As far as I know, there is no way to see a list of all communities from all federated instances. There are some external sites that seem to have these sorts of lists like https://lemmyverse.net/communities
If not, someone could just set up a rogue instance, create fake communities on it, then start pushing a million pictures per minute to every Lemmy instance, exhausting their resources