Your question is Modular Mobile Frameworks for External Use. 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).
Explain how you design and maintain modular iOS frameworks or Android SDKs for external consumption.
Discuss how you would structure the modules and layers, define the public API surface, isolate platform and networking concerns, inject dependencies, and keep consumers insulated from implementation changes. Explain how you would test the SDK, document integration behavior, manage versioning and compatibility, and prevent internal types from leaking into the public contract.