My 17 year old daughter uses drugs and I can’t stop her

I’ve tried so many things and I’m just giving up but then I feel guilty for giving up. It’s marijuana only but still not ok for her developing mind. Will she blame me down the road for not helping her/enforcing rehab or something ? I have terrible anxiety about it all. And living together 24/7 per COVID makes it obvious to me when she uses.

C- my daughter smokes marijuana
T- I want her to stop
F- sad
A- I feel paralyzed and sometimes just don’t do anything as feels easier and less confrontational
R- my daughter continues to smoke marijuana and I’m unhappy with my parenting