You can follow the below documentation to get an insight into how you can use the Contact Form 7 widget:

Step-1:

From the Elementor panel, drag the “Contact Form 7” widget to a container on your page.

Step-2:

Under the “Contact Form” option, select the desired contact form.

Step-3:

Move to the “Style” section and adjust the padding, margin, background, and alignment of the form first. Then customize the “Input” option with appropriate values. 

Step-4:

Customize the “Textarea,”  “Label,”  and “Button” options by adjusting the necessary parameters.