the exchange platform is a profit project, so you need a developer team, a future vision, and a lot of details that you do not seem to achieve due to how you write this topic.
And not mentioning the entire security that it has to have. It's the most important matter in building an exchange platform. Because having not such will lead to a huge loss in their entire fund or storage which will be used by their platform.
It would also be great if they can maintain the developers for it. But anyway, OP what's with this project now? did it push or not?