At present, Apple's iWork suite of applications (Pages, Keynote, and Numbers) do not have a built-in accessibility checker with step-by-step guidance. And while there are ways to improve the accessibility of Pages, Keynote, and Numbers documents, they cannot always be made fully accessible to all users, especially those with certain disabilities.
ⓘ We strongly recommend exporting Pages, Keynote, and Numbers documents to their Microsoft Office counterparts and then making the MS Office version accessible.