"Device Information. Data from which your device could be identified, such as device serial number, or about your device, such as browser type. Usage Data. Data about your activity on and use of our offerings, such as app launches within our services, including browsing history; search history; product interaction; crash data, performance and other diagnostic data; and other usage data."
Apple collects extensive device identifiers and usage data including browsing history, search history, app launches, and diagnostic data, which goes beyond what's strictly necessary for core device functionality.