Not able to click on "google login" and "FB login" in ios browser application


I am testing a mobile website in IOS through appium automation. In login scenario, I am trying to login through google login or facebook login, but I am unable to click on those button. I have tried with different xpath, but it is not working.

I tried to use “nativeWebTap : true” capability , then it was clicking on “FB login” button , but then it is causing some server problem. so I removed that capability. Google login is still not working.

Appium : 1.15.1
Python : 3.7
IOS real device iphone 7 plus : 12.3.1

This issue is coming only for ios mobile, not in android phones. What could be the issue?