Hello Concerned: I noticed this is your first post here on PC. So... welcome to PsychCentral.

Below are links to 13 articles, from PsychCentral's archives. The first 3 discuss the issue of trying to change someone else. The fourth admonishes us to not give up hope on someone you love who's acting in hurtful ways. The next 8 deal with various aspects of parenting teenagers. The last article discusses how to talk to someone who always becomes defensive.

I don't know if anything in these articles can be of much help. From what you wrote, it sounds to me as though your daughter has "de facto" emancipated herself. And as a result, she is no longer under your control nor do you have any way of enforcing any kind of limitations on her. Under those circumstances, I'm not sure there is really much of anything you can do other than to stand by, see what happens, & be there to help your daughter pick up the pieces (should you wish to) if she falters.

You Can Only Change Yourself

Stop Trying to Change People Who Don't Want to Change | Happily Imperfect

When You Want to Change a Loved One

Reasons Not to Give Up On Someone You Love (Who's Acting In Hurtful Ways) | Neuroscience and Relationships

Teenage Depression

https://psychcentral.com/lib/part-1-...enage-mindset/

https://psychcentral.com/lib/part-2-...e-for-parents/

https://psychcentral.com/lib/courage...ur-teen/?all=1

https://psychcentral.com/lib/how-to-...s-not-at-them/

https://psychcentral.com/lib/teenage-anger/

https://psychcentral.com/lib/parenti...dium=popular17

https://psychcentral.com/blog/5-tips...troubled-teen/

https://psychcentral.com/lib/how-to-...ets-defensive/

I hope you find PC to be of benefit.