Availability of the Payment methods Scripts API in the Shopify App

[jessicazu]

I am developing a shopify application.
One of the things I want to do in the app is to change the name of the "payment method" at checkout.

I just tried to create a script on the following page of document.

https://shopify.dev/apps/checkout/scripts/payment-changes/payment-script-example

When I type the command `shopify script push` in it, I get the error `Couldn't push script to app. You do not have permission to do this action.` The documentation says `Shopify Scripts`.
I'm wondering if I can send a request to scripts-beta@shopify.com to get it working. (Please let me know if this is not the case).

What I'm hearing is that the documentation says `Shopify Scripts are in beta and only available to stores on the Shopify Plus plan. Enrollment to the beta program is closed. Does this mean that the store where I install the app has to be shopify plus?

(Does it mean that the script won't work if the store is not shopify plus and installs this app?)