Only Samsung Galaxy devices can communicate with SmartTags and run the SmartThings Find app. On other Android devices the tags are still shown on the dashboard (in the ‘On the go’ room by default) but they are marked as ‘Not supported’ and when clicked they just bring up a message saying they aren’t available.
Yup. Don’t even see them at all. Mind you, if I could see them, but not locate them, then it’s not really worth her having the app anyway.
In the meantime, she has my Samsung account details and can use the find my devices website. Suboptimal, but better than nothing