@gammarco 

As far as i know, tapo does not have widget on Android system, you may want to ask this on the google community. Is only this shortcut missing? Can you control the plug with voice command or with google/Tapo APP normally?

  @Riley_Blue Thank for your answer :)

I think it's not an Android widget, after I added the link with Tapo service in the Google Home app a "button" with the name of my L510E lamp appeared in the Google Assistant Ambient Mode to turn it on and off, the name of the P110 smartplug it's not showing instead. The google voice commands are working flawlessly to turn on/off L510E and P110 both.

I posted this question to the Google community, too.

Have a nice day

  @gammarco 

Wow that's cool, and strange too... So the tapo is now a Lamp (device type) in the google home? Or is that a customized type, you can change the name whatever you want?

What happen if you change it back to the Plug type?

  @Riley_Blue 

Yes, the TAPO plug is shown as a lamp in google home, but I can only turn it on/off, I can't control the brightness level (like L510E lamp).

I can change its name and if I put it back to plug type I can still control it with google voice commands and in google home but it disappear from the Ambient mode.

  @gammarco 

probably a bug on google ambient mode...