It seems that the documentation here
https://www.mediawiki.org/wiki/OOjs_UI/Widgets/Icons,_Indicators,_and_Labels
no longer reflects the the full set of icons. Also, indicators seem to be handled as icons now and not as separate widgets.
full list of icons from demo:
Icons:
Indicators
Icons - movement
Icons - content
Icons - alerts
Icons - interactions
Icons - moderation
Icons - editing-core
Icons editing-styling
Icons editing-list
Icons editing-advanced
Icons media
Icons location
Icons - user
Icons - layout
Icons - accessibility
Icons - wikimedia
It seems like new code examples will need to be prepared for each of these icon category to be consistent with documentation template on the whole.