Telegram apps fall foul of iOS App Store content rules
Found on Techcrunch on Thursday, 01 February 2018

“We were alerted by Apple that inappropriate content was made available to our users and both apps were taken off the App Store. Once we have protections in place we expect the apps to be back on the App Store,” he wrote.
“Apps with user-generated content or services that end up being used primarily for pornographic content, objectification of real people (e.g. “hot-or-not” voting), making physical threats, or bullying do not belong on the App Store and may be removed without notice,” the iOS guidelines add.
So Facebook would never make it into the App Store either?