Have a look here (https://thegeoict.com/blog/2019/10/28/downloading-12-5-m-alos-palsar-high-resolution-dem/). The resolution is 12.5m but you can resample it to 10m, the difference is not that large.
It would be interesting to learn the Maroccan geospatial authorities' answer to your inquiry.
Otherwise, there is no 10 m free DEM available at the moment.
And finally, are you sure you need this resolution for such a large area? I would suggest going for the Copernicus DEM. It is currently the best out there.