The function is available on the Telegram desktop client. Its essence is that a button appears to hide dialogs and channels in which you have disabled notifications.
1. Go to “Settings” of the program.
2. Type the word “workmode” on the keyboard. Do not pay attention that you do not see the entered word.
3. A pop-up window will appear. Press “OK”.
4. The application will restart and the button “Hide chats without notifications”. will appear above the list of chats )
When you click on the button, you can switch the dialog with disabled notifications. If you want to remove the button, then repeat the above points.