I know this seems unnecessarily complicated, but there are good reasons why servers work like this.
Every server is totally independent, to prevent anyone taking over the network.
It would be incredibly expensive to have a record of every post by every person on all other servers, duplicated thousands of times over on every other server.
So, as a compromise, servers only list accounts and posts that they have "noticed". Here's more info about this: https://fedi.tips/which-posts-and-accounts-can-i-see-from-my-server/
2/2
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.