Salesforce Fact #942 | PermissionSetLicenseAssign

Similar to PermissionSetAssignment, we have an Sobject PermissionSetLicenseAssign which keeps track of the assigned permission set licenses.

The below query returns the list of PSLs assigned to the users:

Select Id, PermissionSetLicense.DeveloperName, Assignee.Name FROM PermissionSetLicenseAssign

Reference: https://developer.salesforce.com/docs/atlas.en-us.object_reference.meta/object_reference/sforce_api_objects_permissionsetlicenseassign.htm