I am showing uploaded documents using ncolumn table on dashboard. i have onether

Create a document type process variable of type mutiple, every time append the uploaded document in to this pv. If you are displaying the docs in process dashboard then directly refer this pv in ncolumn table. If the deletion functionality is subprocess or part of the main process then pass this pv as reference to subprocess or remove the deleted document ID from that pv, so it automatically updates when dashboard gets refreshed.