Add arrows during screen sharing on iPhone, iPad, or Mac?

Re: Add arrows during screen sharing on iPhone, iPad, or Mac?

... how can I do that with either iPhone, iPad, or Mac?

Now, am no expert in this area,. Sorry I can't spell out for you how to achieve that, step by step. Yet Apple does have some articles online (links below) that may help:

See how to: Share the screen of another Mac - Apple Support

Seems you gave Apple support access to your Mac in order to help you.

I don't think the use of this arrow feature or controlling another's device is available for general use by all those who can and can't be trusted. I could be wrong.

You might be interested in finding out more about Apple Remote Desktop:

Apple support's article:

Control or observe one client computer with Remote Desktop - Apple Support

Eg" says: "You can control a screen to assist a user with a problem or to perform activities on a computer that doesn’t have a display, ... "

For the person whose computer you would want to operate on remotely.

Of course they would need to allow you access, (as you likely did for Apple):

Allow Apple Remote Desktop to access your Mac

There's an Apple Remote Desktop User Guide for Mac - Apple Support will all the "how-to" info on what's possible.

_____________________________________________________________

Another system altogether:

Organisations and Educational institutions etc. can set-up systems to control all the devices in their care, so they can update them and much more: Choose a mobile device management solution - Apple Support