How to default AR transaction type on basis of combination of order type and line type from SO

Summary:

We want to default AR transaction type on basis of combination of order type and line type from sales order.
Since pre transformation rules will become obsolete in future. It is advised to use order extension rules.
But we are facing errors while doing so.
Do we have scripts for same requirement.

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

25C (11.13.25.07.0)

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