I want to automatically return to the app from an external browser (safari) on iOS.

After logging in with an external browser using iOS(swift), automatically (without user intervention)
Is there a way to return to the original external browser caller?
The external browser uses safari.

After pressing the Facebook login button in the application's internal browser, the dialog does not appear, so
I'm thinking of an external browser.
Chrome is not installed.

Thank you for your cooperation.