How I read the question is he is asking for is what is the full command line options to OpenVPNConnect.exe
This was also discussed on reddit here:
https://www.reddit.com/r/OpenVPN/comments/klnl1j/new_command_line_options_for_openvpnconnectexe/
That thread determined there is a "connect" option to choose a profile from the command line once the configuration has already been imported.
However, I can't find any information on a CLI method to import the configuration file to add a profile.
Instead, I found this knowledgebase article:
https://openvpn.net/vpn-server-resources/use-openvpn-connect-v3-on-windows-in-service-daemon-mode/
But this discusses setting the profile for the ovpnconnector.exe service agent and it isn't clear it will have any impact on OpenVPNConnect.exe
So far I haven't been able to use set-config on OpenVPNConnect.exe directly.
It might be that using the service agent could work for what he is trying to do but my gut tells me that isn't what he is looking for.
Instead, it might be possible he will need to put a request into OpenVPN AS support with a feature request.