Custom preloader loading time question

I have in a scene a quite big fbx model. During preloading (default preloader scene only with a different logo) logo and progress bar are mostly invisible during the whole preloading process. Preloading shows at 90%. So it`s visible only 10%. Is there any way to show preloader earlier with a whole preloading process to not let the user watch a mostly black background without anything? What should I change in the default preloading scene?

The preloader by default is updated on a per asset basis.

You can added animations/gifs to the preloader to make it look like it is loading something like this: