It's what the media promotes, also because of social media.
Every song on the radio, every new tv show, every movie, in video games, the feminist ideology is promoted.
And social media because of Instagram and Onlyfans, millions of men simping inflates their ego, making them believe they're better then they are and deserve more.
1000's of men in her dm's and notifications, being called a queen and "I don't need no man", since the age of 5, how wouldn't she be a feminist?
The question isn't why are more young women feminist, the question is how aren't all young women feminist with all of the external influences of the media, social media, society, etc.