I can confirm that this issue is resolved in 13.6 beta and it's working as expected.
doiajda
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We are able to track Ajax requests from within our app by passing WKUserScript to WKWebViewConfiguration and then applying this configuration to WKWebView but we are also required to keep track in Safari (and other third party browsers) so we can't rely only on that. Is there a way to track Ajax requests from network extensions?