The Mercury 13 actually existed, though the term was only coined in 1995 by Hollywood producer James Cross. Molly Cobb is based on Jerrie Cobb who scored in the top 2% of all astronaut candidates, male and female, and was the only woman to complete Phase III training. She died in 2019. See more
The press called them the Mercury 13. Each was an experienced pilot with hundreds or thousands of hours of flight time. Each passed the entire battery of physical and psychological tests given the original Mercury 7 male astronauts. Program was killed before they could attend flight training in Pensacola.
I remember. John Glenn really hated that whole thing.
Well, Glenn's not flying anymore. And he's a Democrat, so his opinion doesn't matter.