Fix Shopify Meta Pixel Tracking

My Shopify store is already linked to Meta Ads and the standard PageView and ViewContent events report perfectly in both browser and server-side modes. The problem is that Add to Cart, Initiate Checkout... (Budget: $30 - $250 AUD, Jobs: API Integration, Conversion Rate Optimization, Facebook Ads, Facebook Pixel, JavaScript, PHP, Shopify, Shopify Templates)