Hello!
Are you using the Client-side Human Services (CSHS) feature for creating your case pages? CSHS pages provide much more flexibility in creating your BAW case solution UIs and much easier customization as they provide many out-of-the-box UI views of various complexity.
Here is a basic functional example of pointing the ECM Document List view on a case details CSHS page at the case instance folder and filtering it by a specific document class ID. You would copy/paste for each doc class you want in separate lists.
IBM_TargetObjectStore is the built-in reference to the case runtime object store.
FSR_VesselPhotos is the ID of a document class defined in my case project.
caseId is the case instance folder ID variable that is passed into the case details CSHS as an input parameter.
https://www.ibm.com/docs/en/baw/25.0.x?topic=toolkit-ecm-document-list

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