The official guide from Proton, https://protonvpn.com/support/ios-vpn-setup/, requires the use of "OpenVPN Connect" app.
Some inspiration from this guide: https://surfshark.com/blog/how-to-setup-vpn-on-iphone, tells me that I can possibly setup vpn manually on iOS via:
Go to Settings > General > VPN & Device Management > Click on the VPN tab.
Click on Add VPN Configuration.
.
.
However, I will need the following information::
-
Type: IKEv2.
-
Description: Your preferred name of the connection.
-
Server: The hostname of the server.
-
Remote ID: Copy the hostname you put in the Server line.
-
Local ID: Leave it empty.
-
User Authentication: Username.
-
Username: Put in the service credentials,.
-
Password: Put in the service credentials,.
-
Proxy: Off.
