Ah, I don’t think you used that word before, ‘packaged’.
If that’s the problem, then it’s not properly packaged.
I think there’s a problem in UE5 where the packaging doesn’t work correctly when you call it from the menu. But it does if you call it from the ‘launcher’ ( also on the menu ).
If something is packaged for distribution, there should be no shader compilation, grass map builds etc.
If you can open the console in the distribution, it’s not packaged right.