2.1 Install a custom Pixel tracking code

You can completely attach a custom tracking code to the element if needed:

Have 2 option:

Option 1: Attach the code according to Facebook standards

Guilde Link: https://www.facebook.com/business/help/402791146561655?id=1205376682832142

Option 2: Attach the code according to the Webcake standard to avoid being warned by Pixel

You can use fomular example:

fbq_webcake('track', 'Purchase', {value: 1.00, currency: 'USD'});