The phone is already full of finger prints, including the one on the fingerprint reader. All you need to recover it is sticky tape or cyanoacrylate, make a rubber molding and apply it again to the sensor. Fingerprints are a schtoopidttt way to lock a phone. It is like leaving the key under the doormat.
They can, but they are not allowed to. They are trying to do an end-run around the muzzle order, to salvage their sale.
Yahoo is contaminated now with radio-active US Gubmint BOHICA red tape. Nobody will touch them now without a very long depleted barium barge pole.