You don't need to require OEMs sell their parts. They just need to be unencumbered by IP and other restrictions, i.e. customs. Then the parts will become available on the secondary market as companies disassemble dead devices and resell them.
But you are right - if they did gets the parts from a different device they should be allowed to reuse them freely.
Wonder if there's any data on that. Given the extent to which China recycles electronics (some of which I've seen myself), it wouldn't surprise me if China-sourced replacement components were actually recovered from discarded devices.
I don't think the previous comment was licensing the design. Apple has been very aggressive with donor parts and data recovery.
I’ve seen plenty of articles about parts coming directly from factories, rather than from torn down devices.
What is the actual ratio of stolen vs recovered by non-Apple facilities ?
I’m sure Apple would claim 100% stolen and rtr orgs would say 100% recovered. Note that Apple pays (in the form of a discount) for returned devices so if a refurbisher is selling parts they’ve claimed aren’t recoverable they are selling stolen goods (reason for destroying irrecoverable devices is to reduce/remove incentive for this type of theft)