Can you setup home sharing on an iPhone

You set up home sharing in iTunes on a computer.

Use Home Sharing to share media from a computer to other devices - Apple Support

If you don’t have a computer there is no way to home share. Home sharing is used to share content from your iTunes library on your other devices.

You now control Apple’s user-to-user technical support site? Since when?

You started with a question that Demo answered and then you challenged his answer citing things you have looked up. You provided no link here for anyone to look at.

The Apple TV cannot set up it’s own network ID so you cannot use it as an ad hoc network so you can’t mirror to it. What you can do is set up an ad hoc network on your computer and then connect the Apple TV to that network and turn on home sharing.

what do u mean exactly? sharing photos or music or ?

Home sharing also works over WiFi so that wouldn’t help anyway. I don’t have Apple TV, but you can’t stream at all without WiFi.

I don’t think he is having the problem so why don’t you look up peer to peer mirroring and fix your problem.