Swappa should require the FULL model #

I have delved into the rabbit hole of buying a used iPhone and have discovered that a useful piece of information is missing from nearly every listing. the full model number! For example, I see the iPhone 11 Model number listed is A2111 which is a USA model but that only tells part of the story of the device. There is also the model info number of MWLL2LL/A (which is exactly what I am searching for) which tells me that this phone is a FACTORY UNLOCKED model which is sold by Apple, has 256 GB and is Black (I really don't care the color for my phone search, but that is the info for that model number). While I am searching for a TRUE Factory Unlocked model, I find myself having to ask sellers to check their phone listed for that info, which I feel takes the sellers time to check, and my time to ask. By having this simple requirement provided, it could help a lot of people, and sales etc. by giving us ALL the info about the phone listed. What do others think about adding this requirement to a listing?