Description

In the post sidebar, the revision row includes a number on the button, clicking which switches to the revision diff editor.

Sighted users can understand that this is a revision number because the text "Revisions" is on the left side. However, for users who rely on screen readers, when they focus on the button, it is only announced as {number} button, making it unclear what this button is for.

This issue has likely existed for some time, but since a new visual revision diff will be introduced in 7.0, it might be worth fixing in the 7.0 release.

This issue should be resolvable by adding an aria-label in addition to the visual text. Similar efforts are underway in other panels.

Perhaps a label like Open revisions screen: {revision_number} revisions would be appropriate.

Step-by-step reproduction instructions

• Launch your screen reader.
• Open the post sidebar.
• Focus the revision button

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure