Custom app options to add customer IDs

We want to provide a version of our subscription app to on Apple business, which doesn’t support subscriptions.

If we offer a non-subscription version of our app as a custom app it seems that it must be made available to at least one business customer ID before submitting to review. Is that correct?

Can additional business customer IDs be subsequently added to the AppStoreConnect list so that more Apple business users can access and buy the same app? Or does each customer need a new app submitting?

Custom app options to add customer IDs
 
 
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