She helped (not sure how much as I don't know how team gymnastics works) her college team win the national championship literally earlier this year, so not really sure wtf your problem is? Maybe, I don't know, do a simple search first? Granted I didn't know who she is until an article about her returning for 5th year on yahoo sports, but its not like this info is tough to find.
LSU gymnast Olivia Dunne announced that she's returning to compete for a fifth year of eligibility. She's among the most popular college athletes on TikTok and Instagram, earning millions in NIL income.
sports.yahoo.com
And you're surprised that a blonde white female athlete makes a bunch of money wearing bikinis on social media? I think she's dating a male professional athlete as well.
Also, she makes a lot of money via the changes to college athletics, which is a good thing that athletes can make money instead of schools exploiting the shit out of them. Sure, most of it is horndog frat bros, but fuck if I care that some woman makes money from horny guys. If that's your problem then your problem is with the horny guys, not her.
In short, horny dudes on social media leads to dolla dolla bills y'all.
Now, based on success in the sport, should she be making more than Biles? No.