OP, I think it's pretty sad that people are dumping all over you on this thread. Not sure why people think it's "punching up" to make fun of a woman who has been successful, but it doesn't reflect well on them. It's a totally reasonable question.
There's research showing that in households where women out-earn men, both the men and the women are more likely to misreport their earnings on surveys in ways that make the men look relatively more successful. So it clearly bothers some people who are in committed relationships enough to lie to random strangers who survey them.
https://www.census.gov/library/stories/2018/07/wives-earning-more-than-husbands.html
I'm a man whose wife earns more than he does and it doesn't bother me at all, so we do exist. I have other sources of social status though, and my income is still pretty decent. I could imagine it being more of an issue if I really didn't have anything going on, or if I felt like my career was failing.
But would you really be dating someone like that?