Why don't I see Instagram or Slack app in the share view in W10m

[DjeTe]

If I have a Picture and choose share, I see Twitter, one drive, etc but I don't see instagram or Slack. Why is that

 

[libra89]

I'm guessing because you might have to do that in the app itself.

 

[pkcable]

Not sure about Instagram since that seems to be fully out, BUT slack for Win10 mobile is still a beta, perhaps that feature is still in the works?