Due to MotionLayout, the bottom nav bar won't hide on scroll. Instead give recyclerview bottom padding to avoid last row/item being partly hidden.

app/src/main/java/awais/instagrabber/customviews/helpers/CustomHideBottomViewOnScrollBehavior.java

@@ -1,5 +1,7 @@
 package awais.instagrabber.customviews.helpers;
 
+import android.content.Context;
+import android.util.AttributeSet;
 import android.view.View;
 
 import androidx.annotation.NonNull;
@@ -12,6 +14,13 @@ import com.google.android.material.bottomnavigation.BottomNavigationView;
 public class CustomHideBottomViewOnScrollBehavior extends HideBottomViewOnScrollBehavior<BottomNavigationView> {
     private static final String TAG = "CustomHideBottomView";
 
+    public CustomHideBottomViewOnScrollBehavior() {
+    }
+
+    public CustomHideBottomViewOnScrollBehavior(final Context context, final AttributeSet attrs) {
+        super(context, attrs);
+    }
+
     @Override
     public boolean onStartNestedScroll(@NonNull final CoordinatorLayout coordinatorLayout,
                                        @NonNull final BottomNavigationView child,
@@ -23,7 +32,13 @@ public class CustomHideBottomViewOnScrollBehavior extends HideBottomViewOnScroll
     }
 
     @Override
-    public void onNestedPreScroll(@NonNull final CoordinatorLayout coordinatorLayout, @NonNull final BottomNavigationView child, @NonNull final View target, final int dx, final int dy, @NonNull final int[] consumed, final int type) {
+    public void onNestedPreScroll(@NonNull final CoordinatorLayout coordinatorLayout,
+                                  @NonNull final BottomNavigationView child,
+                                  @NonNull final View target,
+                                  final int dx,
+                                  final int dy,
+                                  @NonNull final int[] consumed,
+                                  final int type) {
         if (dy > 0) {
             slideDown(child);
         } else if (dy < 0) {

app/src/main/res/layout/fragment_discover.xml

@@ -10,12 +10,15 @@
         android:id="@+id/swipe_refresh_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:clipToPadding="false"
+        android:paddingBottom="?attr/actionBarSize"
         app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/topics_recycler_view"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
+            android:clipToPadding="false"
             app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
             app:spanCount="2"
             tools:itemCount="10"

app/src/main/res/layout/fragment_feed.xml

@@ -24,6 +24,7 @@
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:clipToPadding="false"
+        android:paddingBottom="?attr/actionBarSize"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintTop_toBottomOf="@id/header">
@@ -33,7 +34,6 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:clipToPadding="false"
-            android:paddingBottom="?attr/actionBarSize"
             tools:listitem="@layout/item_feed_grid" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 </androidx.constraintlayout.motion.widget.MotionLayout>

app/src/main/res/layout/fragment_hashtag.xml

@@ -18,6 +18,8 @@
         android:id="@+id/swipe_refresh_layout"
         android:layout_width="match_parent"
         android:layout_height="0dp"
+        android:clipToPadding="false"
+        android:paddingBottom="?attr/actionBarSize"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintTop_toBottomOf="@id/header">
@@ -26,7 +28,6 @@
             android:id="@+id/posts"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:clipToPadding="false"
-            android:paddingBottom="?attr/actionBarSize" />
+            android:clipToPadding="false" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 </androidx.constraintlayout.motion.widget.MotionLayout>

app/src/main/res/layout/fragment_location.xml

@@ -18,6 +18,8 @@
         android:id="@+id/swipe_refresh_layout"
         android:layout_width="match_parent"
         android:layout_height="0dp"
+        android:clipToPadding="false"
+        android:paddingBottom="?attr/actionBarSize"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintTop_toBottomOf="@id/header">
@@ -26,7 +28,6 @@
             android:id="@+id/posts"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:clipToPadding="false"
-            android:paddingBottom="?attr/actionBarSize" />
+            android:clipToPadding="false" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 </androidx.constraintlayout.motion.widget.MotionLayout>

app/src/main/res/layout/fragment_profile.xml

@@ -19,6 +19,8 @@
         android:id="@+id/swipe_refresh_layout"
         android:layout_width="match_parent"
         android:layout_height="0dp"
+        android:clipToPadding="false"
+        android:paddingBottom="?attr/actionBarSize"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintTop_toBottomOf="@id/header">
@@ -28,7 +30,6 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:clipToPadding="false"
-            android:paddingBottom="?attr/actionBarSize"
             tools:listitem="@layout/item_feed_photo" />
     </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>