Want an automation to open a specific app on my iphone

I have read online on how to create an automation that will open a specific app on my iphone but cannot seem to get it to work. I already have an automation that runs when I single press my aqara button–it turns on my roku TV and sets it to YouTube but I would also like it to open the Roku app on my iphone. Anyone get this to work and have detailed instructions? The ones I have read say to “create a notification with a URI” but fail to show any details on how…

This feature is only available for android phones.

https://companion.home-assistant.io/docs/notifications/notification-commands#launch-app

The doc is outdated or it is somewhere else (which would be weird…)
you can try this example for spotify. not sure which app you want to open and if that would work though

data:
  message: "Play a song please"
  title: Open your spotify app
  data:
    actions:
      - action: URI
        title: Open Url
        uri: spotify://
action: notify.mobile_whatever

Where does this go? In a script?

Yeah…no, I missed the ‘automation’ part…sorry…I sort off only looked at the response above and earlier experience about starting apps on iPhone from a notification…apologies

or you can create a shortcut on your iPhone and launch it directly with card action.

  tap_action:
    action: url
    url_path: shortcuts://run-shortcut?name=Open Unifi