What is necessary to allow NVDA to pronounce and display in Braille notifications?

Sylvie Duchateau

Hello all,
I work every day with the Slack application which is getting more and more accessible thanks to feedback we send to their developers.
I have an issue: when someone mentions me, I get a sound notification. It is displayed in the Windows Task bar, so that sighted users can see it, but NVDA does not pronounce or display it in Braille.
As notifications work fine for incoming email in Thunderbird or Dropbox information, I wonder what NVDA needs to be able to speak this notification.
If you have the answer, I could send a suggestion to the Slack developers.
Thanks for any input