Cross BU payments

Summary:

Our understanding is that cross BU payments can be made against any number of invoicing BU's as long as the invoicing and payments BU's are in same ledger. Can this also be achieved through refund and one-time payments?

Content (please ensure you mask any confidential information):

We have a business requirement where one BU owns the bank. Every receipt and payment is handled by the one BU. How can that be achieved?
All BU's share the same ledger.

Version (include the version you are using, if applicable):

Oracle Cloud - 23 D

Code Snippet (add any code snippets that support your topic, if applicable):