I have a note 10 plus and the KED cover...... which had stopped working.
I thought that it was the cover, so I bought a replacement..... but it also didn't work.
The LED icon editor seems to be loaded in the system apps, but it doesn't appear in my 'loaded' apps screen.
I've rebooted, invoked nfc and unmounted / remount the LED cover.
I've looked in the settings but the LED icon editor is not there.