I am new to this space, where can I locate the Accessibility Checker? Is there one?
Hi, @khebert! Welcome to our community! 
Thank you for your interest in this feature. Unfortunately, a dedicated Accessibility Checker that automatically scans documents and provides a list of accessibility issues and recommendations has not yet been implemented in ONLYOFFICE Docs.
This request has already been registered in our internal tracker. I will add your feedback to it and update this thread as soon as there is any news. At the moment, I am unable to provide an estimated implementation date.
In the meantime, ONLYOFFICE editors already include several accessibility-related features, including alternative text for objects, screen reader support, keyboard shortcuts, color modes, UI adjustments, and useful plugins. You can find more information in our documentation: Accessibility features in ONLYOFFICE.
Thank you again for your question!