I'm not very familiar with this specific 'Undercover Wife Based on a True Story'. It could be a book, a movie or a TV show. Maybe it's about a woman who goes undercover for some important reason while being a wife at the same time. But without more information, it's hard to say exactly what it is.
Undercover is purely fictional. The plot and characters were crafted to entertain, not based on real events. However, sometimes fictional stories can draw inspiration from real-life situations or themes, but in this case, it's not a direct retelling of any true story.
Undercover Season 2 is purely fictional. The plot and characters are made up for entertainment purposes and have no direct connection to real-life happenings.
It might also be a drama. Since it's based on a true story about a wife, there could be a lot of emotional and relationship - centered aspects that would fit well into the drama genre. For example, how her undercover work affects her relationship with her husband and family.
I'm not sure if it's widely known. It could be a relatively niche production that only certain people who are interested in undercover stories or true - story adaptations are aware of.