Access Nested Fields of Apex-Defined Data Types in Flows
Data access limitations for Apex-defined data types are removed, so
now you can access nested fields of record and Apex-defined data types. For example, access
{!MyApexClassOne.MyApexClassTwo.MyField} or
{!MyApexClass.Account.BillingCity}. Previously, you were limited to a
single level of field access for example
{!MyApexClassTwo.MyField}.
Where: This change applies to Lightning Experience and Salesforce Classic in Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.