On July 15, 2021, the Material Components for iOS library and its related Material Foundation and Material Motion dependencies entered maintenance mode. This included:
We recommend that you follow Apple's Human Interface Guidelines and consider using modern UIKit components or SwiftUI instead. Both offer a high degree of flexibility through which you can express your product's brand while providing a predictable and familiar Apple platforms experience for your users. You'll also benefit from ongoing investments Apple makes in accessibility, ease of use, and deep integrations with OS features.