Well I have my WIP at the stage where I just need to hit the 'Submit App Detail Page' in the developer's setup for an Android app.
But, I need to get the WIP done and submitted to iOS and Google before I can complete the process.
Facebook won't even let you start an iOS app until you the App Store ID from Apple for it.
Most of the bits used to set up a Facebook Android app will use the same data as for other submissions: lots of different text fields (different lengths allowed) to describe the app; contact info (including a web site with privacy policy); and lots of different graphics.
Fortunately, most of the banner and icon graphics are just different sizes of the same one. Some new graphics had to be created for different display ratios.
I think I spent most of one day getting all the text and graphics done.
I was able to test in the sandbox and then managed to delete my test app! Sometimes cleaning up is the wrong thing to do. (And, yes, I also emptied my trash on my Mac Mini.)
Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master