Analyzify includes the Facebook Pixel tags on GTM. However, we wouldn't recommend using them unless you have a problem with the native integration or you have a Shopify Plus store.
We strongly recommend using the official Facebook App for your product feed, Facebook Pixel, and Facebook Conversion API setup. The native integration works quite well when the setup is done correctly.
For Shopify Plus stores, we additionally recommend Analyzify’s Facebook Conversion API connection (included in our server-side add-on), as we can send more data than the native integration.
For regular Shopify stores, the native connection is the best solution at the moment.