iOS game won't launch - PackagingResults:Error: Error Launch failed! Unknown Error

Looks like you’re not getting the same error from before in this one, this one is standing out now:

LogPlayLevel: UnrealBuildTool: ERROR: No modules found to build. All requested binaries were already part of the installed engine data.

This one means that there is a third party plugin that you’ve included in your engine installation, most likely from the marketplace, that needs to be recompiled. The problem is that the editor can’t find the module to do so as this isn’t a code project and there are no modules. Could you try adding a new C++ class (File > New C++ Class > Actor > Next > Create Class), let it create the class and generate the code for the project and then try to package?