Does the Proton VPN iOS app route all DNS queries through the tunnel, and ultimately to their DNS servers, on both cellular and Wi-Fi?

I figure WiFi will for but I only have a very basic understanding of how cellular data works and I am pretty new to the privacy conscious networking game. So maybe this is a stupid ass question but I’d appreciate any insight!

P.S. this is my first real post into the fediverse! Be gentle.

Apparently this is a tough problem for mobile devices… GrapheneOS (security hardened OS based on Android) took months to fix a leak someone reported, and had to collaborate with the VPN app providers to do it https://github.com/GrapheneOS/os-issue-tracker/issues/3442

I remember hearing a couple different times over the years that iOS leaks data even with VPNs on. Here’s one article for example.

https://protonvpn.com/blog/apple-ios-vulnerability-disclosure/

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