Do Adobe InDesign templates only work in InDesign? What are the options for design template formats, and what programs do they work in?
Yes, InDesign templates only work in InDesign. In general, any program that offers a template feature uses a proprietary file type that can't be parsed by other programs. I'm not sure what exactly you're trying to do, but I will say that transferring between various parts of the Adobe suite is possible depending on the file formats you're working with and what your end goal is.