It took several months, but Facebook finally updated its iOS applications to support the higher resolution of the iPhone's iPhone XS Max and iPhone XR phones that Apple released in autumn, allowing Facebook to run on the native resolution of the device instead of the XS XS size one, over 9to5Mac.
The update also adds support for larger screen sizes on the latest 11-inch and 12.9-inch iPad Pro models that were released last spring by removing the black bars that the app displayed. (Although the usable area of the application is basically the same.)
Updated iPhone apps get slightly more space with upgrades. The XS XS Max and the 1792 x 828 (2x pixels) XR screen with the 2688×1242 resolution effectively lead to a rendered display of 896 x 414, slightly up from the XS and X 812 x 375 dimensions.
In related reports, Apple has revoked the Facebook Developer Certificate in response to a social network that abused these permissions to distribute the adult and teens tracking application, which has paralyzed Facebook's ability to develop new versions of its iOS applications by preventing companies from internal testing Newer Hardware.