Pretty sure Apple is not selling any devices running iOS 11 these days...
"AppleInsider has confirmed with sources inside Apple not authorized to speak on behalf of the company that the legal department believes that iOS 12 is the solution to any conceivable patent violation, wasn't present at the ruling at all as it was performed ex parte, has requested the Fuzhou court to reconsider the decision, and has filed a formal appeal to clear the decks of the threat which will allow it to "wipe the precedent from the annals of history."There is a lot of needless investor panic about the Chinese iPhone 'ban' | AppleInsider
Qualcomm does not interpret it the same way that Apple does. But, the company complained about iOS 11 with the court, and not iOS 12 in much the same way that it complained about the iPhone 6S through iPhone X. So far, Qualcomm has not responded to AppleInsider's questions for clarifications on the matter.
Chinese courts will ultimately decide the true way. But, regardless of how Qualcomm wants to interpret the ban, the iPhone XR, iPhone XS, and iPhone XS Max aren't listed as banned products."