Based on the screenshots, this does not look like a standard table write-access issue. The user can access the workspace and can initiate the “Create new case” modal, but the case type dropdown is empty for non-admin users while admin users can see the options.
In Source-to-Pay Workspace and Finance Operations Workspace, the “Create new case” popup is not driven only by the classic System Definition > Interceptors configuration. In Workspace, the modal is rendered through UI Builder / Page Collection, and the dropdown values are populated by a Data Resource. ServiceNow’s S2P article explains that the case interceptor popup in S2P and Finance Workspaces is rendered by a UX page in the workspace Page Collection, and the dropdown is fed by a Data Resource that builds options based on the case types associated with sn_spend_sdc_service_request. The article also points to the Data Resource named Get Service cases/task data 1, which calls:
JavaScriptdata.dropdownData = new InterceptorUtil().constructDataForLinkSet(input.query, input.table)
So the issue is likely in the Workspace Case Interceptor configuration / Data Resource / role filtering, not just the table ACL on sn_spend_sdc_service_request.
