Some pages of iOS wkwebview can't be opened. Why?

Today, load an activity page of the company, in which there is a function of contacting customer service, which receives the customer service of Baidu. Then uiwebview can open it, but it can"t be opened in wekwebview. Why?

the following is the address
from=singlemessage&isappinstalled=0" rel=" nofollow noreferrer "> https://m.cheguo.com/usedcar.

the customer service on the click interface cannot be opened on WKWebview.

ask for some ideas

Apr.26,2021

IOS processing

// Url  
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {  
    NSURL *URL = navigationAction.request.URL;  
    NSString *scheme = [URL scheme];  
    if ([scheme isEqualToString:@"tel"]) {  
        NSString *resourceSpecifier = [URL resourceSpecifier];  
        NSString *callPhone = [NSString stringWithFormat:@"telprompt://%@", resourceSpecifier];  
        /// iOS 10  
        dispatch_async(dispatch_get_global_queue(0, 0), ^{  
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:callPhone]];  
        });  
    }  
    decisionHandler(WKNavigationActionPolicyAllow);  
}

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