Short answer: yes and no. No, we don't have anyway to communicate or see what's happening back home. Yes, we can still get information. Usually when someone else shows up from your world. They could be from years before or after you arrived.
Parallel timelines being a thing, just because someone shows up from your world in the future, however, does not mean they've showed up from your future, but it can give you an idea of what might happen.