@reach/utils is a utility library designed to provide common functionality for building accessible React components. It offers a set of helper functions and utilities that can be used to enhance the accessibility and usability of your React applications. While @reach/utils serves as a foundational tool for accessibility, there are other libraries in the Reach ecosystem that focus on specific UI components. Here are a few alternatives:

• @reach/dialog is a library that provides a simple and accessible dialog component for React applications. It allows developers to create modal dialogs that are compliant with accessibility standards, ensuring that all users, including those using assistive technologies, can interact with the dialogs effectively. If your application requires modal functionality, using @reach/dialog can help you implement it in an accessible manner.
• @reach/router is a routing library for React that focuses on simplicity and accessibility. It allows developers to create dynamic and nested routes in their applications while ensuring that the routing experience is accessible to all users. If you need a straightforward routing solution that prioritizes accessibility, @reach/router is an excellent choice.
• @reach/tooltip provides a tooltip component that is designed with accessibility in mind. Tooltips are commonly used to provide additional information about UI elements, and @reach/tooltip ensures that these tooltips are usable by all users, including those who rely on keyboard navigation or screen readers. If your application requires tooltips, using @reach/tooltip can help you implement them in a way that is both functional and accessible.

For a comprehensive comparison of these packages, check out the following link: Comparing @reach/dialog vs @reach/router vs @reach/tooltip vs @reach/utils.