Accessibility allows users of all abilities to understand, use and enjoy the web. As a UX designer, it is important to build empathy and celebrate accessibility requirements as a set of design constraints to build a better product. And it is our responsibility to make sure we design in a way that is usable to all users irrespective of their situation, abilities, or context.
These resources would help you to build a more accessible product.
Design Accessibility Checklist
Mobile Apps Accessibility Checklist