Hello Jocelyn Flint,
There isn't a way to see this information on the items themselves. However, every Broadcast will send a notification to the recipients' Messages area (https://digitalworkplaceurl.com/my.discussions): https://customercare.igloosoftware.com/support/knowledgebase/all_articles/articles/messages_userbar_menu.
This will indicate the item that the Broadcast was made from, the Broadcast itself, and the groups that it was broadcast to.
Please let me know if you have any questions.