https://www.techradar.com/news/iphone-xs-camera-ios-121-update

One of the features Apple introduced with the iPhone XS is the ability to adjust depth-of-field while editing photos users have already taken. But Macerkopf reports that owners of the new smartphone and the larger iPhone XS Max will also be able to change picture depth while they’re snapping photos as part of the iOS 12.1 update.

Anyone who downloaded the public beta for iOS 12.1 toward the end of last week should have this capability. It’s likely to be included in the final version of the software update, which is expected to be publicly released in late October, maybe around the time the iPhone XR launches on October 26.