Solution: Can’t find “contact form shortcode” in Wordpress Customizer

Contact form will be displayed here. To activate it you have to set the “contact form shortcode” parameter in Customizer.

Okay… but what if you CAN’T FIND the “contact form shortcode” parameter in customizer?!

Solution: just click on that box, then enter the code (see image above). So easy, but so not obvious. (source of this solution)

(And by the way, you find that “contact form shortcode” by going to “All Forms” under WPForms. Copy the whole thing, including brackets.)