If you want to know which leads on your Lead List have already been shared (or pushed) to your linked groups/chapters you can view this information on your Lead List.
Shared or Pushed Leads
If a lead has been shared with all linked groups/chapters they will have the shared icon on their image thumbnail.
This is what it looks like when a lead has been shared.
Summary
If you want to know which leads on your Lead List have already been shared (or pushed) to your linked groups/chapters you can view this information on your Lead List.