Removing the cordova webview plugin and reinstalling the latest version solved the problem. Took me about 5 hours, I’m happy :D.
ionic cordova plugin rm cordova-plugin-ionic-webview
ionic cordova plugin add cordova-plugin-ionic-webview@latest
Reference Link – https://stackoverflow.com/questions/54149061/ionic-ios-tabs-page-can-bounce-white-space-on-top-and-bottom-of-app-area