We are using Contact Form 7 plugin for this theme, It’s one of the best contact form plugin for WordPress.
You can use default form that comes after installing this plugin or you can use or customize form like the demo.
Go to the Contact > Add New. Here you will see a default form code like the screenshot below.
Replace the form code by the code below, it will make the form like your demo.
Finally, it will look like the screenshot below –
Save the form, and go to the contact page(Edit With Elementor). Here, you will see the contact form element. Edit the element in the form select dropdown select the form that you created few minute before.