BUG: With Iconify.basic and preloaded icons it doesn't convert icons added later on.
The example illustrates this (run with npm start). The result you see is that the X in the web page are not converted to an icon.
Uncomment the Iconify.scanDOM() line in index.js to see that then the X are converted. With regular @Iconify/Iconify the Iconify.scanDOM() call is not neccessary.