Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
16" MacBook Pro Now Available
Apple Experiencing Issues With iCloud Services and Retail Store Systems [Resolved]
The company says only that "some" users are affected, but social media reports suggest the outage is fairly widespread.
Apple is also having problems with its retail store systems, with a number of users reporting that employees are unable to complete customer purchases or support requests.
Systems are down completely @apple store international plaza Tampa, Fl. Can’t even get my watch fixed— wakaidev (@wakaidev) July 4, 2019
Update: Apple Cash, Apple Pay card management, and Mail Drop are now also affected.
Update 2: According to Apple's system status page, all issues have been resolved.