Locating the Subscription Id for a recurring donation in Salesforce Nonprofit Cloud

As noted in the Data mapping from Soapbox Donations to payment processor and Salesforce Nonprofit Cloud article, the Subscription Id for a recurring donation processed by Soapbox is recorded in the Gateway Reference field of the Payment Instrument record. The follows the recommendation from Salesforce for recording this data.

The Payment Instrument is related to a Gift Transaction record which is, in turn, related to a Gift Commitment record. If you wish to display the Subscription Id on the Gift Transaction or Gift Commitment page layout or include it in a report, consider creating a formula field or an automation to reference the value on the Payment Instrument record.