Notify if One (or more) Covers in Automation Fails Action

I have an automation (see below) that closes window blinds at a specific time of day but I want to create an automation that sends a notification listing the cover devices in that automation that fail to close.

I’m guessing it would be better to include the notify as an additional action in the same Close automation, following a wait command?

I haven’t got a clue where to start with this so I would welcome any help.

- alias: Close Blinds
  id: close_blinds
  mode: single
  trigger:
    platform: numeric_state
    entity_id: sun.sun
    attribute: elevation
    below: -0.4
  condition:
  - condition: state
    entity_id: sun.sun
    attribute: rising
    state: false
  action:
  - service: script.close_all_window_blinds