IP and DNS Leaks in WebKit Affecting Proxy Browsers and iCloud Private Relay

When I go to https://leaks.psylo.app on "Possible IP leaks" side I see only "WebAuthn" with my real IP and, occasionally, WebTransport with an incorrect IP. For "HTTPS Traffic" it always show some other relay. Using Safari 26.5

I'm not sure what would I use WebAuthn for, if ever, maybe I could disable it through "Feature Flags" menu?; regardless, I never treat Apple's services as "premium", since the email fingerprinting thing. I pay mainly for Hide My Email, just to organise things per domain, and it's cheap.

I love iCloud private relay, but I need a way to turn it off. A command line utility would be amazing, along with the ability to turn off/on DNS-over-HTTP.

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