Discord is a chat and the default setting of every server is that to see the content of it, you need to join the server.

It make sense for a chat.

However, companies and communities have largely misused discord and basically turned it in forums.

Lots and lots of knowledge is spread on these chats with no way of finding it unless you know which server to join and provided they do not shut down at some point.

On top of that, the discord search feature is barebone at best.

This is the problem with discord.