Facebook Login workin on Android not on IOS

We are developing an app on Windows and once we developed the app and pack for Android the Facebook login works properly.

Once we move on IOS the login allow the redirect to Facebook but when redirects to the app the login doesn’t happen.

We are using ionic v3.20. I checked the logo of xCode but I could not find any error related to it (Or maybe I overlooked) Someone can help troubleshoot the issue?

I’m having the same problem, on android cell phone, on devapp android, works perfectly, ja no iphone devapp, when redirects, it hangs