Fill empty space inside a CoordinatorLayout - android-coordinatorlayout

Question

I'm trying to have a bottom sheet layout that will always appear on the screen.
I know I have to use the CoordinatorLayout if i want to use the "app:layout_behaviour" and also the CoordinatorLayout must have a match_parent height so when i'll expand the bottom sheet then it will go all the way to the top.
The problem is that while I want the bottom sheet layout to always appear on the bottom of screen I also need a ScrollView to contain different views, BUT it has to "fill" the empty space between the top of the screen to the top of the bottom sheet layout.
I know its possible to use 0dp to match constraints with ConstraintLayout but that wont work here because bottom sheet behaviour must be used with CoordinatorLayout. How can I achieve it?
Below is the basic code:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/mainLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- THIS LAYOUT'S HEIGHT MUST FILL THE SPACE BETWEEN THE TOP OF THE SCREEN TO THE TOP OF
THE BOTTOM SHEET-->
<ScrollView
android:id="#+id/scrollContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<!-- Some layouts that the user can scroll-->
<!-- Some layouts that the user can scroll-->
</ScrollView>
<RelativeLayout
android:id="#+id/bottom_sheet_parent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/rounded_bottom_fragment"
android:elevation="30dp"
app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
<LinearLayout
android:id="#+id/bottom_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<View
android:layout_width="48dp"
android:layout_height="6dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="8dp"
android:background="#drawable/rounded_button" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="4dp"
android:padding="10dp"
android:text="Sheet title"
android:textSize="17sp" />
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/bottom_view"
android:background="#color/recyclerViewBgColor"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
android:paddingTop="12dp"
android:clipToPadding="false"
/>
</RelativeLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Any kind of help is appreciated!