What do you want to do?
I doubt that you could differentiate between a
Mini 3 Pro that was sold as just ( a drone, controller and battery) and a
Mini 3 Pro that came as part of a DJI supplied fly-more package but, if you know the date of purchase and the order in which you first used each drone, you should be able to separate them.
I am on the wrong computer to check properly but from a quick scan of some logs on this computer the first 3 or perhaps 4 characters in the drone's serial number are unique to the model e.g.
P3-Adv/Pro = 03Z,
Mavic 2 zoom = 0M6,
Mavic 2 Pro = 163, Mavic Mini = 1SC,
Mini 2 = 3NZ or 3NZC.
I am not sure in the "C" in the serial number of the
Mini 2 is correct, I have only looked at 4
Mini 2 flight logs.
If the drone serial numbers are missing in flight logs, look at the camera's serial number and or perhaps the "SERIAL.flightController" column in the PhantomHelp csv.
I will check later on another computer that has a better library of flight logs.
In the Phantomhelp csv of the flight log there is a column entitled "OSD.droneType" that lists the drones type/model.
Similarly if you upload logs to Airdata the front page of each log lists, from memory, the drone's model.
If the logs are all Fly app logs then the Fly App can also sort/display the logs by the individual drones BUT the App ONLY displays the logs created using the current DJI account.
If you have several DJI accounts then you would need to log in and out of each account one by one.