tunnelkit | VPN client library for Apple platforms | VPN library

I'm trying to figure out how to make a network extension so that my iOS app can programmatically open an custom VPN tunnel in C#, but looking at some similar Obj-C projects I'm not sure if it's possible in Xamarin (as I don't see a network extension project in Visual Studio) and how to port a what I gather is a required PacketTunnelProvider class which I think must be present and listed as an extension in the plist.info first...I'm in particular having most trouble in how to port the parts of that class which appear at the end as an extension and some event handlers named like this func Adapter(adapter: Adapter, configureTunnelWithNetworkSettings networkSettings: NEPacketTunnelNetworkSettings, completionHandler: @escaping (AdapterPacketFlow?) -> Void) and func Adapter(adapter: Adapter, handleEvent event: AdapterEvent, message: String?) as they both have a different signature than an event handler in C# which accepts sender and eventArgs (or something derived)…if anyone did this in C# I'd like to know at least if it's possible if not how to port such a class?

I've found this one project https://github.com/ss-abramchuk/OpenVPNAdapter (since it seems to do most of what I want) that I managed to translate into a Xamarin binding library but I'm unsure how and if to incorporate its PacketTunnelProvider class in Xamarin (as that is what the readme says you should use to incorporate something like that adapter)...I gather one should add to plist.info something like this first: