In the Samsung SmartThings app, there is a feature called "Notify Me When Left Behind". A message may appear stating "Notify when left behind is only supported on Galaxy devices running Android 12 or higher". However, customers who have upgraded to Android 12 cannot activate the "Notify When Left Behind" feature.
Presently, this feature is not available on third party devices, such as the YIP Smart Tag. Samsung is actively working to make this feature available in the coming months.