It's not just silicon. It's voice coil motors, wire winding and more.
From William Gallagher's "Strong iPhone 13 sales make camera suppliers prioritize Apple" posted Wednesday on AppleInsider:
Demand for the new iPhone 13 range has seen Taiwan-based camera component suppliers give priority to Apple over Samsung, and Chinese phone companies.
Apple has previously benefited from processor manufacturer TSMC prioritizing it during the global chip shortage. Now camera lens component companies are also electing to service Apple's requirements, specifically because of demand for the iPhone 13.
According to Digitimes, Taiwan-based makers of camera components such as voice coil motors, wire winding, and more, are seeing higher and more stable profits from Apple.
My take: An army may move on its stomach, but our devices move on their supply chain.