The third key element would be the resolution. Whether they find their family completely, partially, or in some unexpected way. And how this discovery or reunion changes their lives. It could bring about a sense of closure, new relationships, or a whole new perspective on life.
I'm not entirely sure which specific 'Finding a Family' true story you are referring to. There could be many works with this title. It might be a documentary or a biographical film about someone's journey to find their family. Maybe it involves adoption, long - lost relatives being reunited, or a search for one's roots.
It's not a true story. 'Finding Jack' is likely based on imaginative concepts and creative ideas rather than real-life events. The plot and characters are likely crafted by the author's imagination.