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I found this document: https://www.onera.fr/sites/default/files/actualites/breves/Fiche_AMPERE_VA.pdf

There are some things I don’t really see, they claim:

“reduction of energy losses due to friction, due to boundary layer ingestion by means of the

32 fans located on the wing upper surface”

As we can see, all the fans are placed right in the front of the wings, so there is very little boundary layer to ingest. Boundary layer ingestion is usually not regarded as an advantage, many intake systems (e.g. NACA duct) are especially developed especially to avoid this. The total surface (inside and outside) of all those fans will be huge, I doubt, this will result in low friction compared to any well-known propulsion system. The outler of the fans will be highly turbulent, so the wings will not have anything like a laminar flow, which will also increase friction.

They might have been inspired by Lilium, which, at least, have some boundary layer to ingest…