The instance is lemmy.world, the community is c/fediverse, while you can post whatever regardless of your instance, you can’t post whatever you like into a community, you need to follow the rules and themes.
Communities are after all the equivalent of subreddits while instances are just serverd where accounts reside and communities are hosted.
Then why would you post this nonsensical question in c/Fediverse?
People can have accounts in multiple places.
The instance is lemmy.world, the community is c/fediverse, while you can post whatever regardless of your instance, you can’t post whatever you like into a community, you need to follow the rules and themes.
Communities are after all the equivalent of subreddits while instances are just serverd where accounts reside and communities are hosted.
You’ve entirely missed the point.