Maybe Apple stopped allowing iOS 16 devices that can update to 17 from updating to new iOS 16 versions? I wouldn’t know, nothing I have runs iOS 16 (or 17, for that matter).I am guessing not. There's still heaps of "fresh" devices that can't update to iOS 17.
Apple did release security and bugupdates for iOS 15 just before iOS 17 was released and I am expecting apple to do the same for iOS 16 now. It will most likely only be fixes, not feature updates for iOS 16.