A default Magento 2 provides a contact form for customers to reach the store's staff. This communication channel is often used as a channel for providing customer support, thus the Help Desk MX module, which is a tool for organizing a versatile support system in Magento, replaces the default contact form.
The extension can be used to create a Magento 2 custom contact form. However, there is no HelpDesk MX and Custom Form Builder integration at this point. When you create custom form in Magento 2 by the module, it will not be suitable for usage as a support channel since there is no option for adjusting the "reply to" field of notification emails for the submitted form. The Magento form creator sends emails from the same address as the gateway email in the Help Desk MX, meaning that the "reply to" field would have the store's email and not the customer's email.