Hi,

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Cascading variables require that the same variable name be on both the order guide and the ordered items.

If the variable names are different , you can use 'Item Variable Assignments' (related list available on rule form) to map it. Use assignment type as Order Guide Variable.

Please refer below

For more information, refer below docs:

https://docs.servicenow.com/bundle/orlando-it-service-management/page/product/service-catalog-manage...

https://docs.servicenow.com/bundle/orlando-it-service-management/page/product/service-catalog-manage...

If I have answered your question, please mark my response as correct and/or helpful.

Thanks,

Suseela P.