Tracking all of the issues brought up with the 1/4 accessibility pass on Facepile control
Details on individual bugs can be found on SharePoint
Breakout of issue #7534
@aneeshack4 this sounds like it is part of the facepile narrator revamp in #10851
Once we know how a facepile is supposed to announce on focus, we can also determine how it should announce when it changes.
@Markionium @mtennoe any thoughts on how Facepile is supposed to announce on focus and changes?
@micahgodbolt did some investigation into Facepile's DOM structure and it looks like listbox isn't being used properly here/per w3 spec:

listbox should technically be used to identify an element that creates a list from which a user may select one or more static items. Not sure if that fits the Facepile situation... is it really a listbox where each item should be actionable or should the role be provided by user?
I'll let @Markionium comment on that as he has the best accessibility overview :)
The team that owns Facepile is tracking this separately and will get a fix for it out soon. For now I'll assign this to @mtennoe and @Markionium so they can update these issues when those fixes are done.