Availability Telegram Messenger app on the Apple Watch App Store ?

Why is Telegram Messenger no longer available on the App Store for the Watch since my update to Watch OS 9.0?

Has anyone else had the same experience?

Is there any other solution to still get the Telegram app working on the Watch7 ?

The Telegram app is installed on my iPhone SE2, but wouldn't appear on the "available apps" list in the Watch app on my iPhone tot transfer.