Considering you posted on lemmy.world and the reply came from dbzero, it's likely banned by lemmyworld.
The instance? No, a db0 user being able to reply herem proves the opposite. The instance is not fully blocked by lemmy.world. This is the only example that comes to mind of specific community defederation vs. instance as a whole.







That why you sign up at an instance that's not LW or db0 👍