A sticky CTA Button makes it easy to click, the user doesn’t need to scroll and look for the button.
Here's how you can make the CTA Button of your checkout page sticky using Elementor.:
Step 1: Click on 'Edit' to edit your checkout page using Elementor
Step 2: Click on the pencil icon of the Checkout Form widget
Step 3: Go to the Style tab and select 'Buttons'
Here you'll find the option to make the Button sticky for mobile.
Simply hit the toggle to enable it.
You can also set the button width and alignment from here.
Step 4: Click on the 'Update' button to save your changes
There you go! You can preview the checkout page on your mobile to see how the sticky CTA Button looks.