Hello,
I'm French and happy to be on this forum to share with you an eFatbike experience across the Sahara.
I've just come back from a crossing where I assisted Nathalie Baillon, a long-distance ultra cyclist, who decided to cross the Sahara off-road in discovery mode.
If you're interested, I've put together a short video with English subtitles
https://youtu.be/qco_qvfX5Cg?feature=shared3 or 4 other videos of fatbikes and free rides in the Sahara can also be seen on the channel.
If you have any questions about organizing such a trip, I'm here to help.
Best regards
Cyril