FWIW, when I was a kid, I was a more profligate spender than sibling or parents. My parents worried I'd never learn financial responsibility, even though I started working at 17-18 between school years, and I worked multiple part-time gigs all the way through college. I paid for half of my college costs with scholarships; parents paid the other half out of pocket, leaving me with no debt, for which I'm immensely grateful.
Impulse control is hard when you're young. I wasn't crazy with money; I was responsible, but I did live more freely then. As I grew older, all the parental lessons & modeling about avoiding debt, living within your means, buying even big things with cash, saving 20% (or more) of each paycheck, etc., sank in. Spouse & I are now not far from FIRE. I'm far less materialistic as a more mature adult than I was as a newly fledged one.
As kids grow into adults, they need to defy, experiment, and try on different personas to see which ones fit them best. Your daughter may not be done yet, and she may not stay in a spendy space forever.