One of the things to bear in mind when sharing stories is: the smaller the space, the more sensitive to security it will be. It’s easy to say “India [or China or Indonesia or similar places] are engaged by missionaries.” These are huge population zones, and saying this gives little away that isn’t already obvious.
It’s really not too bad to say this about very large provinces (e.g. places with, say, populations of 10 million or more).
But if we were to say this about a very small population area - for example, with populations in the range of 1,000 to even 100,000 - it could be far more problematic.
Saying such things about such places could result in punitive action by either governments or mobs. There have been cases where people posted stories on Facebook or Twitter, which were then seen by people living in those places and resulted in mob action. (There are people on social media who are running active searches for their people group or their place; I have had to block people on Twitter so that I don’t show up in their searches.)
I have also seen news articles in secular press–even recently–about Christian efforts in very restricted spaces. We need to be thoughtful and careful about sharing with the press, and even resharing even these already-public posts. It is a fine line to walk.
Being an active advocate for a people group or a place requires us to be thoughtful about how we share and who with. Mobilization does not necessarily require us to share all that we know, all the time, in all venues.