Hi,
from what I know, you can expect a mix rather than something that is purely technical or purely strategic. The case is usually designed to test whether you can switch between numbers and bigger-picture thinking. It is mainly about how you use financial concepts to support a broader argument.
I would go in with the mindset that both angles can come up and that the important part is showing a structured approach. If you stay calm, explain your reasoning clearly, and connect the analysis back to the overall business context, you can stand out at this stage.
Best of luck with your prep.