“Meta tells The Verge that it’s not currently training its AI models on those photos, but it would not answer our questions about whether it might do so in future, or what rights it will hold over your camera roll images.”
Facebook is asking to upload your camera roll to its cloud on a regular basis, including photos you never posted. Accepting also accepts Meta AI terms that cover analyzing faces. Google says it does not train on Google Photos. Meta would not make the same promise.