Hi, @themrcod !
The process of adding the Facebook Pixel has very recently changed. Prior to Friday September 4 2020, merchants could input a Facebook Pixel ID in Online Store > Preferences. This is no longer possible, but for merchants who had a Facebook Pixel ID entered in this field, this will continue to function. Merchants will now set up their Facebook pixel in the Facebook channel. If you go to it's old home in Online Store > Preferences, you will see this button redirecting you to the Facebook channel to set up the pixel.
All the best!