Yes, but they don't have to use genuine Apple parts or verify any of it through Apple's services. With Apple's repairs, they disassemble the devices and re-use

Yes, but they don't have to use genuine Apple parts or verify any of it through Apple's services. With Apple's repairs, they disassemble the devices and re-use the parts for service. With these third parties, they don't have to use parts that are at parity with the originals.