Why do you not just use the offical Proton VPN app for iOS?
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I’ve been using the official app without any issue for a while now. Wouldn’t that be easier? Or do you have a specific use case?
Just to answer here in the thread also, as answered on reddit:
IKEv2 has been discontinued on iOS for security reasons:
https://protonvpn.com/support/discontinuing-ikev2-openvpn-macos-ios/
You'll have to use an app, whether that is the Proton VPN app, Open VPN app, WireGuard app or something like Passepartout.
The OpenVPN app works with the OpenVPN protocol and thus with the OpenVPN configuration files.
The WireGuard app works with WireGuard configuration files.
Passepartout works with both, OpenVPN and WireGuard configuration files.
Thanks for sharing information here as well!
I open the proton vpn app, turn on my vpn and set everything up in the app.