I am working on creating a branch of Unity for Immersive Vehicles (aka MTS) and I would like to have it displayed on the "Mods in Progress" table that I am. Is there something I need to do to make that happen? or do I just ask?

I believe that is for official updates only but you could try PRing the Readme.md

Please could you provide a link to the mod's repository (or repository where the assets are)?