Check Column Options
When you enable the check section from the column tab, then your customer is able to select one or multiple products by clicking the checkbox.
By default, no products are selected, but if you want all products to be selected automatically when the table loads, you can do that. There is a section “Checkbox Auto Check on Table Load (Enable/Disable)” in the “Options” tab.
Also, you can change those texts to "Add to Cart" and "All Check/Unchecked" from there.