Shopify Scripts not working on cart permalinks

[KTNinja]

Hey, I am trying out Shopify Scripts via Script Editor App on a dev store. I was able to run the script in the editor with no errors. But after publishing, they don't seem to be working on the Cart Permalinks. It works for Online Store and Storefront API. Wondering if Shopify Scripts work on cart permalinks or if they aren't running on cart permalinks from dev stores? Thanks!

[KTNinja · Accepted solution]

Update: Nevermind, it wasn't working because I added "?channel=buy_button" to the end of it, it works!