The People in cart function will display on the product page as follows:
Steps
From your Shopify admin, go to Online Store > Themes
Find the theme that you want to edit and click Customize
From Theme settings > Fomo Popups
Scroll down to PEOPLE IN CAR
Click Show People in Cart
Select Counter Max. (the number displayed randomly from 1 - counter max)
Input Text Field 01 & Text Field 02