Unable to update SharePoint multi-value lookup column using Microsoft 365 Activities or HTTP Request

Hi Team,

I’m trying to update a multi-value SharePoint Lookup column in a document library after uploading a file using the Microsoft 365 activities package. Regular metadata fields update successfully, but the lookup field doesn’t. I also tried updating it using Microsoft Graph HTTP Request, but every PATCH request returns 400 InvalidRequest

Has anyone successfully updated a SharePoint multi-value lookup column in a document library using UiPath Microsoft 365 Activities or Microsoft Graph? If so, could you please share the approach or a working example?