Dear William,
Mainly, our item is an HTML Template and we have just provided a custom WHMCS Template for FREE of cost with our HTML template by customizing WHMCS default six template’s header, footer, and color based on our HTML Template.
In this case, you need to use both the HTML Template and WHMCS templates separately. HTML Template to show/represent your products/services and WHMCS Template for billing like our demo.
Reference: https://prnt.sc/1066o7p
Best Regards,
ThemeLooks Support Team