List does not render with multiple child modules using [parentScroll]="scroll.window"

[MahmoudTarekAli]

is it doable to use it with multiple router outlet.
I have a component inside a module inside another module.
my list has 400 items but it doesn't render them when I am using scroll.window
here is my code

                              [items]="items"
                             [parentScroll]="scroll.window" [enableUnequalChildrenSizes]="true">``</virtual-scroller>```