Looks simple enough to add an aria-label in the template, no other risk here

Change 816054 had a related patch set uploaded (by Clare Ming; author: Clare Ming):

[mediawiki/skins/Vector@master] Add aria-label to TOC collapsible button.

https://gerrit.wikimedia.org/r/816054

Change 816054 merged by jenkins-bot:

[mediawiki/skins/Vector@master] Add text to TOC collapsible button label for accessibility.

https://gerrit.wikimedia.org/r/816054

Test Result - Beta

Status: ❌
Environment: beta
OS: macOS Monterey
Browser: Chrome
Device: MBP
Emulated Device:NA

Test Artifact(s):

QA Steps

Navigate to a page on beta cluster with a TOC
Using VoiceOver or a screen reader, tab to the TOC collapsible icon (visible below desktop viewport 1000px)
❌ AC1: Note that Toggle the table of contents is read and close captioned

@ovasileva I failed this for not having the "Toggle the table of contents" and because the whole thing looks wonky and floats in over the text of the TOC. It doesn't cover the TOC when the site notice and banner are closed. This works fine in prod but that's because there was no banner or site notice.. I just wanted to highlight this before you sign this off.

@Edtadros - Can you confirm the issue you were seeing on the beta cluster was not present in production? Also, I can't seem to reproduce on the beta cluster. @cjming - do you think this is another oddity with the Dog article?

In T310810#8122474, @ovasileva wrote:

I can't seem to reproduce on the beta cluster. @cjming - do you think this is another oddity with the Dog article?

I think so - weirdly the Dog article on beta looks fine when logged-in -- only looks janky as anon. I have a Q out to the engineering channel to see if someone might be in the know. I'll report back here with findings.