PeachPay's Express Checkout has an Elementor widget that you can use to allow your shoppers to check out from anywhere on your store, without adding to cart.
Requirements
You'll need the Pro version of Elementor to access the PeachPay widget.
Adding the widget
Search for "PeachPay" while adding a widget. You can place this widget anywhere Elementor allows.
Customizing the Express Checkout button
Through the Elementor sidebar, you can change the look of the Express Checkout button to suit your needs. You can also set it to open to a specific product, if desired.