First of all, WHMCS is not a part of WordPress and hope you know that “WHMCS is a Client Management, Billing & Support System for Web Hosts”. Moreover, we saw that maximum of our clients using WHMCS Template separately like our demo. However, our theme also fully compatible with WHMCS Bridge Plugin to connect the WHMCS Template with WordPress.
So, you could choose a way from both to use WHMCS Template with WordPress. It’s up to your choice, how you want to use. That’s why, we are providing WHMCS template separately with our Theme. Moreover, you could also able to edit the page URL like https://www.mydomain/billing/ instead of https://www.mydomain/whmcs-bridge/
Best Regards,
ThemeLooks Support Team