Also, instead of pressuring her or letting her know your desperation, think about becoming a counterintelligent ally.
Let her know you wish the best for her, want to know she is well and happy, and you will do everything in your power to help her. Offer to forward her her birth certificate and SS card if she has one so that she can get proper identification in the state. Never make her feel you think she has been captured by a dangerous cult and you are desperate to rescue her. It will only alienate her and push you and everyone else who is worried about her away.
You told her you were looking at JwOrg. You should also look at jwfacts, avoidjw, jwsurvey, watchtowerdocuments. Don’t ram it down her throat, but find subtle ways to introduce to her what you learn. Ask her questions and see if she can answer.
Chances are she is completely blinded by love(infatuation) and her boyfriend is not really into the religion. But his family is and they will do everything to reign her in to also save their son.
The “Mexican” boy she is enamored with might be your greatest ally. You might think he is a good for nothing twat, but he also may be her ticket out of the cult. Maybe they don’t feel they have any options. Have you offered to accept him and your daughters relationship? Offer them an escape route from the cult? California is pretty great, but living with a dozen family members is like living with fish. Smells after 3 days.
Tell her to come home and bring him so you can all talk. See how committed to the religion he is. The family ties will be strong for him, but Hispanic boys do not shy away from possible better lives, especially away from cult patriarchs in the family.
I know it’s a lot to contemplate, but sometimes you have to think outside the box to save your loved ones.