You should be able to get help from Offworld community discord. I've occasionally saw some modders ask questions there in modding channel and other modders give answers to them.

Hello, I am currently working on a educational mod for this game for my university. I have some questions regarding the framework of your game and would be very happy if you could answer them.

Hi. I'm starting some xml modding (thanks to the tutorials) and was wondering if there is a way to duplicate or edit assets from the game, e.g. for adding a new resource or building.

Any help is appreciated!