Interesting news that that the latest update to Find My Mobile ( (version 7.1.08.0) will provide offline tracking, option to turn this on whereby it would show up in another User's Galaxy Device if nearby even when your phone is offline. Conversely if someone else has a lost Galaxy phone offline it will show up in your Device when nearby.
Iphones running ios13 already have this feature apparently.
https://www.xda-developers.com/samsung-find-my-mobile-app-locate-galaxy-devices-offline/
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
