Great news you're up for that role. Cases on supply chain and operations are usual separate types of cases:
SC cases concern how materials arrive at the firm. They often vary in geographic scope (US / global), supplier characteristics, product specifications, cost/quality trade-offs, liabilities / vulnerabiltiies, or any combination of those.
Operations cases concern internal questions like how the firm converts raw materials into finished products, or how it conducts a specific part of the HR / Sales / Customer Service / Manufacturing function(s).
Obviously, either one can be more math intensive or more qualitative-reasoning intensive, depending on where the interviewer may try to draw blood ;) So I strongly recommend you prep for both extremes across a range of the above scenarios.
Happy to assist anytime.