Hi Sean,
We often use "There it is", "Here it is", "They they are" or "Here they are" in a dialogue where we are trying to point out or highlight something to someone.
Example:
John: I can't find my keys.
Judy: It should be in your trousers pocket. You always leave your keys there!
John: No, they are not there...
Judy: There they are! In your back pocket!
Hope this helps.
Cheers,
Lance