Hello Yon,
Greetings of the day!
Below code will help you to hide add to cart button.
Follow the below steps to add custom CSS.
1) Please log in to the admin area
2) Go to “Appearance >> Customize >> Additional CSS”.
3) Paste the below code in “Additional CSS” and save it afterward:
li.product .product-thumb-wrap::before, li.product.purchasable .add-to-cart-wrap{
display:none;
}
Hope it will work for you.
Regards,
Team ProDesigns