Why not share the graphic design outline? Also, you don’t have a brand guideline, product guideline, design brief scheme, etc on this subject?
Is it amateurism or overprotection to have images/low-res renders instead of professional files when I expect such a beautiful creation? I could not decide.
I should say, that I appreciate your collaborative culture however you’ll have your work cut out for you due to these situations. -take it from me.