I personally own and use a number of ‘technical’ pieces of equipment. My cameras all have a serial number. My binoculars all have a serial number. My desktop and laptops all have a serial number. My car has a VIN number which uniquely identifies it. Some (expensive) cars have the VIN recorded again, hidden in multiple parts and places.

I submit that a drone is roughly as complex as a good camera. So, why do they not have serial numbers burned into them?? Why is this not a legal requirement from the government to the manufacturers?

If they did, capturing a drone in Gatwick could have led directly to the manufacturer, the lot and retailer, and the eventual purchaser.

If drones don’t have numbers burned into them, why not?
If they do, why can’t law enforcement find their purchasers?