where in airplay on ios 11.1.2

Unfortunately you can not revert to an older version of iOS after you have updated.

But if you'd like to continue to use an HDMI cable I would suggest you purchase the official Apple adapter.

HERE: Lightning Digital AV Adapter - Lightning to HDMI - Apple

Other wise something like a Chromecast

HERE: Google Express

HDMI cable means you are not using AirPlay. Do not use a cable when using AirPlay. Use Wi-Fi instead.

Oh, and you said "connect to tv." I assume there is an Apple TV in the setup, otherwise, AirPlay may well not work. You need an AirPlay-capable device on the TV end.

Umeshdatt wrote:

Screen mirroring only looking for Apple TV but it’s not showing other tv even its connected with hotspo

Correct. You need an AirPlay capable TV on the TV end. Most TVs do not have this capability.

We're going around in circles. We covered this before.

AirPlay means not using a cable. Why do you insist on using a cable? Are you trying to do something you have not told us here? Why would you not simply click "iPhone" on your TV as I asked/suggested above?

I'm missing something - or you are.

Perhaps you should carefully read the article Ferd II and I referenced above or be much more specific about exactly why you think you need a cable.

Umeshdatt wrote:

I can’t find airplay on my new version 11.1.2

Read: Use AirPlay or Screen Mirroring on your iPhone, iPad, or iPod touch - Apple Support

See "AirPlay content from your iPhone ..." here:

Use AirPlay or Screen Mirroring on your iPhone, iPad, or iPod touch - Apple Support

What are you trying to use Airplay with (iPhone to Apple TV, etc.) and what are you trying to stream?

What happens if you check "iPhone" on the AirPlay link you show in your screen shot above?

What is the device your using in the image?

And what happens after you trust the computer?