The built-in DevTools Accessibility Pane is now enabled by default, without needing to enable experiments (currently in Canary).
Use the Accessibility Inspector to understand what accessibility related properties your inspected elements contain. For example, you can extract:
For ARIA property values you may not be familar with, e.g. for those applicable to
aria-sort, you can rely on the autocomplete functionality within the Accessibility Inspector.
aria-live, autocomplete suggests: