I remember the days when you could use two controllers at the same time with one drones, specifically on my Mavic 2 Pro. One is the primary and the other is the secondary and two people can "fly" the drone.
The answer is clear and it's easy to answer: YES, this drone must be registered according to FAA regulation.
Maybe you're not aware of it and you probably don't know the answer; that's fine, these regulations are often confusing and difficult...
99% of the Mini 5 Pro drones entering the US today have this configuration right out of the box:
Mini 5 Pro, standard battery, no accessory attached, no RID, weight: 251g.
Does this drone need to be registered in the US, yes or no?
For the US recreational flyer:
The Mini 4 Pro with standard battery weight less than 250g and does not need to be registered.
The Mini 5 Pro with standard battery typically weighs more than 250g so it must be registered and the RID external...