Yes, the "Empty Cart" button is available under Admin > Sites > [Select Site] > Open Carts & Saved for Later.
This will help in removing the items in bulk from the cart via Admin.
Note: This button is available on the Admin side, not on the frontend or for end users, hence only the person who has Admin access can clear the cart for a specific user belonging to a specific site.
Trouble logging in? Simply enter your email address OR username in order to reset your password.
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