i don’t have the my watch tab in my watch app

Hello anastasiia137,

Thanks for choosing the Apple Support Communities. It looks like your watch isn't currently paired. Here are the steps we need to take.

Set up and pair your Apple Watch with iPhone - Apple Support

"Turn on, pair, and set up your Apple Watch

1. Put your Apple Watch on your wrist. Adjust the band or choose a band size so your Apple Watch fits closely but comfortably on your wrist.
2. For information about changing the band on your Apple Watch, see Remove, change, and fasten Apple Watch bands.
3. To turn on your Apple Watch, press and hold the side button until you see the Apple logo.
4. Bring your iPhone near your Apple Watch, wait for the Apple Watch pairing screen to appear on your iPhone, then tap Continue.
5. Or open the Apple Watch app on your iPhone, then tap Pair New Watch.
6. 
7. Tap Set Up for Myself.
8. When prompted, position your iPhone so that your Apple Watch appears in the viewfinder in the Apple Watch app. This pairs the two devices.
9. Tap Set Up Apple Watch, then follow the instructions on your iPhone and Apple Watch to finish setup.

To learn more about your Apple Watch while it’s syncing, tap Get to Know Your Watch. You can learn what’s new, view Apple Watch tips, and read this user guide, right on your iPhone. After your Apple Watch is set up, you can find this information by opening the Apple Watch app on your iPhone, then tapping Discover.

Activate cellular service

You can activate cellular service on your Apple Watch during setup. If you don’t wish to, you can activate it later in the Apple Watch app on your iPhone. See Use Apple Watch with a cellular network.

Your iPhone and Apple Watch must use the same cellular carrier. However, if you set up an Apple Watch for someone in your Family Sharing group, that watch can use a cellular carrier different from the one used on the iPhone you manage it with.

Cellular service not available in all regions.

Trouble pairing?

• If you see a watch face when you’re trying to pair: Your Apple Watch is already paired to an iPhone. You need to first erase all Apple Watch content and reset settings.
• If the camera doesn’t start the pairing process: Tap Pair Apple Watch Manually at the bottom of the iPhone screen, and follow the onscreen instructions.
• If Apple Watch isn’t pairing with iPhone: See the Apple Support article If your Apple Watch isn’t connected or paired with your iPhone."

We hope this helps.

Cheers!