Add these codes to the Custom CSS box and Save
Product Block
/* Product Block */
div.product-block div.product-quantity-input {
display: none !important;
}
Shop – Category Page
/* Shop - Category Page */
body.view-list div.product-quantity-input {
display: none !important;
}
All Products
/* All products */
div.product-quantity-input {
display: none !important;
}
Cart Page
/* cart page */
.cart-row-qty {
display: none !important;
}
Specific Products
With specific products, first, you need to create a tag with the name: nqt
Next, assign this tag for products where you want to remove the quantity then use code to Custom CSS box
/* Specific Products */
.tag-nqt div.product-quantity-input {
display: none !important;
}
One Product
#1. You need to edit the product where you want to remove the quantity > Additional Info > Add a Code Block
#2. Paste code to Code Block
<!-- One Product -->
<style>
div.product-quantity-input {
display: none !important;
}
</style>