Appstore on apple watch

Hi dima_, We appreciate you reaching out to us. We understand that you are unable to locate the App Store on your Apple Watch.

In the meantime, we recommend that you check for a software update on the companion iPhone and Apple Watch.

While it isn't inherently assured that an update will resolve the issue, updating to the latest software version for your device can help isolate potential software issues. 

Kindly secure a backup and update.

How to back up your iPhone, iPad, and iPod touch

Update your iPhone, iPad, or iPod touch Update your Apple Watch

The current latest watchOS version is 8.6.

Take care!

Try, on the iPhone, with Apple Watch connected, to go to Settings -> general -> Initialise-> Initialise Home Screen.

In this case you will reset the Home Screen, and you will find the AppStore on the new Home Screen.