I cannot find 1Password icon in Chrome browser on my Android 9 phone

@mbujar 1Password will look for the domain. So if you save any logins with google.com, they should appear when you're on any subdomain within google.com.

The full domain helps 1Password to know exactly when to show you logins, though. I would recommend https://support.1password.com/save-fill-passwords/ so that the URLs get saved in them automatically. It's a much easier way to save logins, and that way 1Password is more easily able to fill them.