The only thing that creates an instance's community is the local time line. Everything else is federated. So what you're really asking for is to be able to easi

The only thing that creates an instance's community is the local time line. Everything else is federated. So what you're really asking for is to be able to easily view another instance's local timeline I guess. There's some work being done in that area, currently focused on merging multiple instances local timelines, but the same technical infrastructure could easily be used to be able to show another instances local time line in the frontend.