The default behavior of the Magento 2 “Add to Cart” button is on click, it uses an ajax to add the product to cart and keep the user on the product page.
You can disable ajax add to cart on the product page in Magento 2 to boost order process and redirect customers directly to the checkout page with the method given at https://meetanshi.com/blog/disable-ajax-add-to-cart-on-product-page-magento-2/
