Yes, its called Lucide. You can find it here:
https://lucide.dev/icons/
We did not include all of it, but hand picked icons to replace existing icons. Some has not been updated and some has been marked as Legacy (none pickable, but will work if already picked)
Its easy to append new icons in the Backoffice code base (See the file called icon-dictionary.json) . And in time, we will also provide a Icon Set Extension Type, so Extensions easily can append more Icons.