How to disable Prevent Cross-Site Tracking in SafariViewController and WKWebview

I have two app, one use SafariViewController ,another is WKwebview. For SafariViewController app: I already disable the prevent Cross-site in the Safari setting in my iphone. But SafariVewiController still prevent Cross-Site tracking. What's correct way to disable this prevent Cross-site function?

For WKwebview app I have already add NSCrossWebsiteTrackingUsageDescription in to project info plist file. And can see the disable/enable button in Setting page. But it not allow to disable it. The button is in gray status. can't click on it.

How to disable Prevent Cross-Site Tracking in SafariViewController and WKWebview
 
 
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