Contact form 7 field repeater plugin allows creating one or more field dynamically.
It is easy to use and lightweight plugin.
Demo: Cf7 Repeater
How to use contact form 7 field repeater?
Upload zip file to your WordPress website and activate it.
Add shortcode in contact form 7 tags as follows.
Example : [repeat demo1 demo2 ]
*Note: Here demo1 and demo2 are adjacent field names.
We must add field name to email message body and attach field name to file attachments.
We can adjust the position of buttons or fields by style.css of your theme file. Add label tag as in the picture.
Demo : Cf7 Repeater
Only $19 for the unlimited installation license.