sun9278888 Sure, add it to the entitlements section of your XML:
<key>com.apple.developer.applesignin</key>
<array>
<string>Default</string>
</array>
btw, I used AIR 32 to build the ANE, but linked it against the iOS 13.1 SDK
As to the issue I was having, it must be my phone as I decided to try on my wife's phone this morning and the dialog popped right up! So now to just figure out what's up on my device and move forward.