OM Extension for credit hold for customer

Summary:

OM Extension to check the Credit Hold for bill to customer.
The below script is worked as expected in SIT instance but not working in UAT instance. Hold flag always coming null instead of Y/N.

Content (please ensure you mask any confidential information):

Our requirement is that to check the Credit Hold at bill to customer using OM Extension . if Credit Hold flag Y then order will not create and else create the order with draft.
Version (include the version you are using, if applicable):

24B (11.13.24.04.0)

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