There's currently no direct way to link someone to the specific waiting INPUT form on a run — you can only share the run URL and expect the recipient to locate the correct node manually.

Would be great to have support to optional shareable URL (e.g. .../runs/{run_id}?node={input_node_id} or similar) that, when opened, takes the viewer straight to the run page with the relevant INPUT form/panel already open and ready for action (Provide Inputs / Approve / Decline).