Speed up start of a packaged game when launch the .exe file

When i double click the .exe file of my packaged project the game start with a delay of 3 minutes (no feedback, only a task of unreal in the list of the task manager but no icon in the task bar).

My project have a structure of a Persistent level with many sublevels. I try packaging the game without compression of .pak files, but the issue still remain. There is a way to speed-up the start or to move the loading of this maps after that the game started?

you should use level streaming

this way you can start with a very small map and load each part of your world when ever you really need them.

I already use level streaming and i start the game with only the persistent visible (no actor in it)