How to enable grouping rule in SMC using Subscription Number as the grouping object?

Summary:

Use Case - During Upsell, I want to add new products to the same subscription. Upsells are triggered from Quoting system and come to SMC through Fusion Order Management.

When the quoting system sends a Subscription Number as a parameter via Fusion Order Management to SMC, SMC should accept that Subscription Number to understand that the new product should be added to this subscription.

By default Subscription Number is not available as one of the available objects in the Grouping Rule criteria.

Content (please ensure you mask any confidential information):

What has been tried so far?

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