On the matter of industry-specific cases:
It will be a mix of cases in a domain-relevant context as well as cases set in a completely different context.
Be aware that frameworks were applicable in the 2000 years, the era of Victor Cheng and Case in Point. McK has long caught up on this and the cases you will get during the interviews are tailored in a way to test your creativity and ability to generate insights, not remember specific frameworks.
In fact, it will hurt you when you try to use a framework on a case that calls for a completely different approach. Also, it gives a false sense of security that will translate to stress once you figure out how your approach won't work during the real interview - I have seen this so many times...
Your goal should be to learn how to build issue trees, interpret charts, and perform math no matter the context, industry, or function of the case. I have a system for that, especially for McKinsey cases, that teaches you exactly this approach + a ton of exercises I give my coachees to progress their ability to come up with deep, broad, and insightful answers for each case individually.
Have a look here to get started: https://www.preplounge.com/en/articles/mckinsey-interview