This. It's an absolute lie. It's not like the old days where this might just have been conceivable. We live in an era where even a lot of the cast don't get the full scripts for these major blockbusters, and when they do thir scripts are tailored to them so that if they're lost or leaked the script can be traced.I'm pretty sure the script thing is a fib. She likes to say things that make her seem important, and brag about being under nonexistent non-disclosure agreements.
The most she is likely tp have is perhaps access to an insider who themselves had seen all or part of the script. Even then highly unlikely.