To some degree... my Uncle sued Fedex, his employer at the time, for unsafe working conditions about 10 years ago after being injured on the job. I'd actually call his lawsuit frivolous but he received a very large sum of money from it. About 5 years ago I used an attorney to communicate with my previous employer about a contract they had broken by not paying the agreed severance compensation.
Im not sure why in this situation you would not consult with an attorney to explore your legal options? Consulting with an attorney and at least initially engaging in a legal discourse with your previous employer is really not that expensive and many times if you have a viable case the legal costs are paid only by a successful settlement. Im not sure what she has to lose here besides seeing if she can get a lawyer to take it on contingency and time documenting the damages.
My honest guess is that IF she has documentation, having an attorney engage Uber would just result in some form of settlement to not have it go into court.