Porting Mobile Game Marmalade/C++ to Unity

We would like to port a game we developed under Art Castle Limited using the now discontinued Marmalade SDK (C++) to Unity and publish it for the Nintendo Switch gaming platform. The game is currently available on the Google Playstore as well as the Apple App store: [login to view URL] The full repository and code base will be made available. At this stage, we want to find anyone who is able to port in general from Marmalade to Unity.