Password AutoFill not working WKWebView

I've implemented Password AutoFill for our webpage. It's working fine in safari browser and SFSafariViewController

Safari browser

Same way, in our mobile app, we are using a web-based login page. For the login, we are using WKWebView, but in WKWebView the popup is not showing, instead, it’s showing the normal keyboard.

WKWebView - App

Already configured Associated Domains under Capability. webcredentials:prod.auth.TestDomain.org