On iOS 13 it looks like openURL is failing for at least facebook.
I have tried a very simple test app to verify , and it always fails with :
2019-06-08 17:31:03.687369-0700 TestFacebook[48641:2771343] -canOpenURL: failed for URL: "fbauth2:/" - error: "The operation couldn’t be completed. (OSStatus error -10814.)"
It will fail on both simulator and device.
If the auth was already present reading the auth from SDK continues to work. Anyone else seeing this behavior or know of a workaround?