How to reset the CookieAcceptPolicy setting for NSHTTPCookieStorage.

I made a change to the CookieAcceptPolicy in NSHTTPCookieStorage in my app:

[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookieAcceptPolicy:NSHTTPCookieAcceptPolicyNever];

When I use the following code to restore its settings:

[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookieAcceptPolicy:NSHTTPCookieAcceptPolicyOnlyFromMainDocumentDomain];

WKWebView still does not store cookies. I found that in iOS 17, the cookie policy for WKWebView can be enabled through the following configuration:

[[[WKWebsiteDataStore defaultDataStore] httpCookieStore] setCookiePolicy:WKCookiePolicyAllow completionHandler:^{}];

But how can this be done in versions prior to iOS 17?