your iPhone
Does not necessarily refer to his specific case. It’s a generic use of the word “your.”
Apple does not need to give permission. Their product is built in China. That said, it doesn’t really matter as I doubt China would ever do something like that to either Apple’s or Bambu’s product.
The minute it was discovered all business relations would cease to exist with either of those two companies.
Maybe you have the receipts saying that the Chinese government has a back door in to the Bambu software?