Your question is Consistency Across Platforms and Sub-brands. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are designing within a large consumer ecosystem that spans mobile apps, web surfaces, and multiple sub-brands. Shared patterns are important for trust and usability, but each platform and sub-brand also has different user needs, business goals, and brand expression.
How would you maintain consistency across different platforms and sub-brands within a large ecosystem?