How to see <private> data in iOS logs?

Looking at iOS 11 logs using Console.app in High Sierra, I see that many important bits of information are masked like this: nsurlsessiond Triggering periodic update to powerlog for client dasd Trigger: is now [] Yelp Reservations Map Extension [19 ] start which makes it hard to see what's really happening. This happens on macOS too, and it can be changed with this command sudo log config --mode 'private_data:on', as described here . How can I enable logging private data on iOS?