popup menu not appearing even after initializing it properly (Android Studio)

Question

so I created a recycler view, and a card view to populate the recycler view. I want to allow the user to click on the cardview, and have the ability to remove an item. I added a popup menu, but it is not appearing. Any suggestions? Thanks in advance.

Code for OnItemClicked(Triggers when a cardview is clicked):

@Override
public void onItemClicked(CartItemsModel cartItemsModel) {
    CardView cardView = findViewById(R.id.cart_container);
    Context context = CartActivity.this;
    PopupMenu popup = new PopupMenu(CartActivity.this,cardView);
    popup.getMenuInflater().inflate(R.menu.options_menu, popup.getMenu());
    popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
        @Override
        public boolean onMenuItemClick(MenuItem menuItem) {
            Toast.makeText(context, "click registered", Toast.LENGTH_SHORT).show();
            switch (menuItem.getItemId()) {
                case R.id.menu1:
                    DatabaseReference database = FirebaseDatabase.getInstance().getReference().child("Orders");
                    FirebaseAuth auth = FirebaseAuth.getInstance();
                    String username = getUser(auth.getCurrentUser().getEmail());
                    Query productIDQuery = database.child(username).orderByChild("ProductID").equalTo(cartItemsModel.getProductID());
                    productIDQuery.addListenerForSingleValueEvent(new ValueEventListener() {
                        @Override
                        public void onDataChange(@NonNull DataSnapshot snapshot) {
                            for (DataSnapshot productIDsnapshot : snapshot.getChildren()) {
                                productIDsnapshot.getRef().removeValue();
                                Toast.makeText(context, "Removed from cart", Toast.LENGTH_SHORT).show();
                            }
                        }

                        @Override
                        public void onCancelled(@NonNull DatabaseError error) {
                            Toast.makeText(context, "error: " + error, Toast.LENGTH_SHORT).show();

                        }
                    });
                    break;
                case R.id.menu2:
                    Toast.makeText(context, "Quantity: " + cartItemsModel.getTotalQuantity(), Toast.LENGTH_SHORT).show();
                    break;
            }
            return false;
        }
    });



}

the menu XML file:

    <?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/menu1"
        android:title="Remove item" />

    <item
        android:id="@+id/menu2"
        android:title="Get Quantity" />
    
</menu>