Make sure your site can be visited directly through the CloudFront Domain Name
Set Up in LSCache Plugin
From the WP Dashboard, navigate to LiteSpeed Cache > Settings > CDN.
Set Enable CDN to ON
Enter CDN URL as your CloudFront Domain Name
Enable the relevant Include buttons. e.g. Images and CSS. For this example, if we don't Include JS, then we also need to remove .js from Include File Types
Set up Original URL as your original domain name (and sub-folder if you are using one)
Verify
Check that the CSS is served from CloudFront
Check that the JS is served from the original domain