Glad to help. Lots of dofferent answers here. The location tracking would be done by the local home assistsnt install, not amazon. Google/apple/etc on your wifes phone would have that data if she leaves if on, but most people do anyway because the vendors make it inconvenint to turn off. I wouldnt recommend this is she does leave the location tracking off in general.

If you want to keep the voice assistant but go private and are intersted in home assistant, they have recently released their own voice assistant that can be run fully localy or intergrate with their privacy first cloud. Installing home assistant and this would be my recommedation to get the best of both worlds.

For plugs, I highly recommend the brand Thirdreality. They have excellent, inexpensive zigbee plugs that work with most any zigbee compatible hubs. Note that if you go the home assistant route and get the recommened home assistant green, you will need a zigbee usb stick.