Somewhat larger lumps fall off aircraft on a regular basis including stowaways.
The impacted drone may have survived the encounter (unlikely), was completely disintegrated (probable), ingested by an engine and atomised without causing any damage (possible), or bits fluttered to the ground over open countryside without causing damage (likely).
The lumps of ice, biological remains and metallic parts that fall from aircraft present a higher risk, particularly on approach paths to landing.