Investigate aria-disabled vs disabled

There are some accessibility issues with using the native browser `disabled` attribute, as it hides the element from Assistive Tech.

The general advice is to use aria-disabled attribute but this doesn't come with the functionality of actually making the button disabled, or any of the styles. We need to look into how important it is to move to using aria-disabled, as it would be a lot of work.

https://a11y-101.com/development/aria-disabled

Start by reviewing the issue's accessibility concern and the linked aria-disabled guidance. Determine how important replacing native disabled attributes would be, including the lost disabling behavior and styles, and document the scope and recommendation as the completed investigation.

Written by the indexing model from the issue text.