So if I build my asset for Github MIT licence so people can do whatever with the code and have a FUNDING.yaml like buymeacoffee.com link in it. Do I need to submit a version without it in order for it to pass?
You should be fine, there’s a feature in the asset store that allows you to link funding sources directly from the store page (Disco Tools - Godot Asset Store). Not sure if there’s any specific FUNDING.yml support built in; I don’t think they’ll stop you from uploading one though.