Sometimes my cat (Nero) sneeks in through an open door/window and therefore his presence is incorrect in HA as he doesn’t return through his smart CatFlap.
I have a script that updates his device tracker through the device_tracker.see service but the wife doesn’t like “Alexa, turn on Nero is home”
With the alexa app, you can create an Alexa routine.
You can setup “When this happens” (trigger) to a voice input of “Nero is home”.
Then you need to add an action in the routine that causes a change the state of the device tracker. This depends on your alexa implementation. Mine is mostly through node red so I can’t help you on this part.