Okay, I managed to fix it on my side ))) and submit
Issue was pretty stupid but still I will report it here.
In build target before I had āIOS Simulator / IPhone Xrā but this way icons are packed only for this specific device and no icon are packed for appstore or iPad. So you need double check that target is set to āGeneric iOS Deviceā to avoid my issue.
Yes. In an Xcode build their toolchain would extract the images from the Asset.car file and put them in the IPA. Since the .car format is proprietary we canāt do that which means you still need to specify them in game.project and in the Assets.xcassets/car file.
Iāve seen that blog post and itās pretty impressive detective work done, but I do not wish to write my own tools or rely on third-party tools when Apple has a good track record of changing stuff without any warning. Itās very frustrating that they use undocumented binary formats and without providing any command line tools to create the files. Why not zip the .xcassets folder and call it a day?
I found that also an online tool to compile those proprietary assets file exists http://www.applicationloader.net/appuploader/onlinetools.php. But I havenāt tried resulting Assets.car file which this tool generates. So you can try to use the tool but on your own risk.
BTW, I did everything described in this topic (unzipped the .app archive and modified the Icon names, Infos.plist etc). I manage to have an ipa that I can upload, but then I receive an email from apple
We identified one or more issues with a recent delivery for your app, Please correct the following issues, then upload again. ITMS-90546: Missing Asset Catalog - Your app is missing the asset catalog file in 'myapp.app'. For more information see http://help.apple.com/xcode/mac/current/#/dev10510b1f7.
I added the Icon-1024.png in the archive and I added