core/homeassistant/components/input_select/icons.json

{
  "services": {
    "select_next": "mdi:skip-next",
    "select_option": "mdi:check",
    "select_previous": "mdi:skip-previous",
    "select_first": "mdi:skip-backward",
    "select_last": "mdi:skip-forward",
    "set_options": "mdi:cog",
    "reload": "mdi:reload"
  }
}