Apple are so large and require such scale and control that they have to phase in technology like GaN over time. You can't just order 15M components, built to a

Apple are so large and require such scale and control that they have to phase in technology like GaN over time. You can't just order 15M components, built to a custom spec, and get them reliably overnight. Hence Apple have been working to scale supply lines, work with suppliers (and their suppliers) and ensure both quality and other factors (like environmental concerns). Anker can go out of stock and then produce again when things stabilize. Apple can't stop selling Macs for 3 months without a major global crisis.