Reminder list automation - this adds reminders to an input select so you can use the remove event script

reminder_list_automation.yaml

alias: Reminder - update reminder select
description: ""
trigger:
  - platform: event
    event_type: set_reminder
  - platform: event
    event_type: remove_reminder
  - platform: event
    event_type: sent_reminder
condition: []
action:
  - delay:
      hours: 0
      minutes: 0
      seconds: 1
      milliseconds: 0
  - variables:
      reminder_list: "{{ states.reminder | map(attribute='entity_id') |list }}"
      set_list: >-
        {% if reminder_list %} {{ reminder_list }} {% else %} No reminders {%
        endif %}
  - service: input_select.set_options
    data:
      options: "{{ set_list }}"
    target:
      entity_id: input_select.reminder_list
mode: single