The portal permits users to create entries in the table. However, users can also remove records from their list within the portal, if desired. This help article explains how.
Permanent deletion is supported through a portal table’s editing child form when deletion is enabled and the current user’s access allows it. Unlike unlinking, this deletes the record from Airtable and cannot be undone through the form. See how to enable record deletion for setup. For reversible archiving instead, use a checkbox or single select field and filter archived records out.