Well, it only took a few seconds to search on the Internet. According to this article dated April 12, 2024, the number of Bachelor/Bachelorette couples who are still married is ... drum roll please ... 28. I must admit ... that's more than I would have thought.
All the Bachelor Nation couples who are still together
http://ew.com/tv/which-bachelor-couples-are-still-together/
The essential American soul is hard, isolate, stoic, and a killer. It has never yet melted. ~ D.H. Lawrence