Development is probably not yet conducted as the release of the prototype is scheduled for 2020. Now developers need to think about how to implement IEO as productively as possible.
I think that the development of a test device or the presence of a beta product has improved the position of the project when conducting an IEO and would interest potential investors.
This is a direct key to the fact that the team develops and it shows, and investors love it most of all, that it is not just money that they collect, but for the development of the project.
In general, the correct solution to this whole thing is that there are special people who know how to conduct tests for beta platforms, after which they give an account with specific problems, this is an option many people use