To some extent words mean what people who use them intend to mean, but in my opinion we shouldn't be calling parts from the same production line counterfeit, because the word implies forgery.[2]
1. https://en.wikipedia.org/wiki/Bootleg_recording
2. https://www.dictionary.com/browse/counterfeit
Edit: changed a word for clarity.
If they had a particular QC standard marking, but had not been manufactured in accordance with that level of QC, that would be forgery, right?
If they bear the trademark of a company that demands certain QC standards, but were produced without those checks, it seems like the same thing in a way.
You don't have to do that.
You're probably partly right some of the time, and my perspective probably has some value perhaps maybe.
I respect that a lot.
In the absence of a legal after market or licensed / genuine / third party parts ecosystem, this is, or should be, the expected natural response: off license / bootleg / counterfeit parts ecosystem.
In my opinion, then, the fault lies with Apple, and / or the absence of a regulated market for those parts and the necessary documentation.
People will find a way to source what they want. How you approach or deal with those problems is probably a political / ideological thing.
Presumably a high volume and skilled third party repair shop and its purchasing people will be a crucial role in buying and distinguishing between the two types of hardware.