To display user input or the value of a variable inside of your form, you just have to write @[input or variable name] inside of a text element (headings, paragaphs, text blocks, etc).
If you for example want to display the value of the field "First name", then you would have to write @[First name].
Example data display
This is how it looks like in the Designer:
Inside the Webflow Designer
The user of the form fills out the "First name" field
User fills out the "First name" field
The first name is dynamically displayed in the next step of the form
(And in all other places where a text element contained the @[First name] placeholder):
You can use this functionality to display any Input value of your choice. You can also display variable values this way.
If you have a variable called "price", then you could display it anywhere inside the form, simply by typing @[price]