Not today. I think moving CSAM from the server where it's done today to device is in preparation for announcing e2e for iCloud photos.
That the insanity of all of this hand waving. Literally every public photo service does this today.
Apple has gotten a ton of heat over this and they haven't once mentioned that e2e on iCloud is something they're working on or that this technology would make possible, so can people stop spreading this narrative that this is their goal? It's completely baseless.