RecyclerView pushes its below button out of the screen in ConstraintLayout

I am attempting to set up a layout with an "X" button pinned to the top of the screen, and then two elements centered in the view. One a recycler view and then, pinned below the recycler view, a button for form submission. The layout I currently have worked until the recycler view outgrows its bounds. Then the submission button is pushed below the bounds of the view and the recycler view does not stay within the layout. How can I center the two recycler and button views but not have the button go past view bounds if the recycler view grows large?

View With Small Recycler View Appears As (it should be centered. my example is slightly off.)

How View Should Appear with Larger Recycler View (the recycler view's content is too large to fit so it scrolls)

How View Actually Appears with Larger Recycler View (the recycler view does scroll, but now it pushes the button off the bottom of the view, which appears as the button being cut off)

Relevant Code Block for XML Layout

<LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="0.45"
        android:orientation="vertical"
        android:background="@color/backgroundLightSecondary"
        android:padding="20dp" >

        <Button
            android:id="@+id/bt_close"
            android:layout_width="20dp"
            android:layout_height="20dp"
            android:layout_gravity="end"
            android:background="@drawable/ic_close"
            android:textColor="@color/textLightPrimary"  />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:orientation="vertical"
            android:layout_weight="1"
            android:gravity="center_vertical">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical">

                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/rv_item_options"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />

            </androidx.constraintlayout.widget.ConstraintLayout>

            <Button
                android:id="@+id/bt_order"
                android:layout_width="150dp"
                android:layout_height="50dp"
                android:layout_weight="0"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                android:background="@drawable/bt_rounded_corner"
                android:fontFamily="@font/microbrew_two"
                android:padding="3dp"
                android:text="@string/btn_add_to_order"
                android:textColor="@color/backgroundLightSecondary"
                android:textSize="20sp" />

        </LinearLayout>

    </LinearLayout>

from RecyclerView pushes its below button out of the screen in ConstraintLayout