@barrygoldman1 each instance operates independently here, and they trade content with each other, but there's no guarantee that any particular instance is going to trade any particular content with any other.

Most importantly, the people running some instances configure them specifically not to trade content with others. So everyone on this platform is under the thumb of their instance operators.

So you might not see replies from other servers because either the other instance is configured not to send you replies or your instance is configured not to accept them from the other.

And that's not even getting into technical malfunctions.