I recently purchased a Tapo temperature sensor and the required hub.  It works well with Alexa routines to turn on and off my electric wall heater.  I noticed that Alexa created three devices for this sensor.  I didn't think much of it at the time, but then I ordered a motion sensor and Alexa also created three devices for it as well.  I order a 2nd motion sensor and the same thing happened.  If I delete any of the three devices, Alexa just recreates them.  The sensors all work just fine with Alexa routines, but there is obviously some issue with the Hub/Sensors involving the skill. I have 6 Tapo C120 cameras, a wall switch, a plug, and an outdoor dual plug.  None of them have this issue.