Had a similar situation in CPT few years back. Got back from the annual U.K. holidays to visit family , 3 days later son started asking where I put his iPad that he gave me during landing. Bit of a mad panic when I had a flashback of placing it in the seat pocket and clearly not taking it out again during disembarkation. Called EK CPT head office and was asked to confirm some details and was informed they have it in their head office. Was blown away that it was handed in , was informed that it would of been challenging to sneak it off the plane if found by someone who wished to keep it as all ground/catering/cleaning crew are checked before and after leaving the aircraft by handheld metal detectors.