There are apps in the Shopify app store which allows to put multiple Pixel on stores.
But setting this all on your store can be tricky you have to make sure the Pixels should not be over lapping anywhere.
I see multiple apps in Shopify apps store, but they are very complex to setup.
I tried one but couldn't setup, i am running ads on my Pixel so don't want to disturb it by trying a new app on the main pixel.
@AngelJulia you won't disturb your pixel if the app is functional. Where you can go wrong with swapping over an app is if the same events are not sent through like viewcontent, addtocart, and purchase events. But all pixel apps should do these, otherwise they're pathetic! You can run pixel 2 in an app side by side with your Shopify pixel 1 before swapping over 1 to incorporate the other events likely produced by the app.