Android Progress bar shows behind Page content

I want to show a progress bar on my screen during the API calls. Created the API as below, but its showing behind the buttons/text field once it is visible. If there are no items on the screen it is fully visible. And if there are buttons or something its showing behind the button. So I can't see it properly. Please let me know if anything wrong with the implementation.

<?xml version="1.0" encoding="utf-8"?>
        <ScrollView 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:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fillViewport="true"
      >
    <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/window_layout"
                android:background="@color/white"
                >
            <FrameLayout
                android:id="@+id/linearLayout5"
                android:layout_width="match_parent"
                android:layout_height="match_parent">
                <LinearLayout
                    android:id="@+id/progress_linear"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center"
                    android:orientation="vertical">
                <ProgressBar
                    style="?android:attr/progressBarStyleInverse"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:indeterminate="true"
                    android:theme="@style/ProgressBarTheme"
                    android:id="@+id/progress"
                    android:layout_gravity="center" />
                </LinearLayout>
            <LinearLayout
                android:orientation="vertical"
                android:layout_marginLeft="20dp"
                android:layout_marginRight="20dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                tools:ignore="MissingConstraints">
                 <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="24dip"
                    android:text="@string/txt_setup"
                    android:layout_marginBottom="16dp"
                    /><RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="42dp"
                    android:layout_marginTop="8dp"
                    android:id="@+id/spinner_layout"
                    android:background="@drawable/spinner_back"\>
                     <Spinner
                        android:id="@+id/spinner"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:dropDownWidth="match_parent"
                        android:dropDownVerticalOffset="40dp"
                        android:background="@android:color/transparent"
                        android:spinnerMode="dropdown" />
                         <ImageView
                        android:id="@+id/spinner_arr"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:src="@drawable/ic__2_web_icons_ic_caretdown_gra"/>
                </RelativeLayout>
            </LinearLayout>
            </FrameLayout>
        </androidx.constraintlayout.widget.ConstraintLayout>
        </ScrollView>

Have you tried:

<LinearLayout
    android:id="@+id/progress_linear"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
+   android:elevation="1dp">
    <ProgressBar
         style="?android:attr/progressBarStyleInverse"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:indeterminate="true"
         android:theme="@style/ProgressBarTheme"
         android:id="@+id/progress"
         android:layout_gravity="center" />
</LinearLayout>

That would possibly bring this layout to the front

android:translationZ="1dp"

Could also possibly work