This is what I could find, on  the page: https://wiki.documentfoundation.org/Accessibility/Accessibility-dev#Mailing_List 

There is a mailing list ( accessibility@...) which can be used for user questions and comments, as well as for developer-related subjects.

• Subscribe by sending a blank email to accessibility+subscribe@....
• or visit the archives

I got a confirm message a few minutes after sending a message to the subscription address.
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Brian - Windows 10, 64-Bit, Version 21H1, Build 19043

The poor wish to be rich, the rich wish to be happy, the single wish to be married, and the married wish to be dead.

       ~ Ann Landers