Proximity Switch?

What distance range are you looking for?

Geopresence usually includes GPS Information, and typically has a region size of at least 500 feet.

Some devices allow for a “near” range of about 50 feet.

And the term “proximity switch“ is normally used for triggers that are within about a meter of the device, so that they are substituting for a regular manual switch.

Any of these options are possible with smartthings, but require different devices and different automations to achieve.

So there’s a big difference between “the lights come on when I get home“ and “the table lamp comes on when I enter the living room.“

The FAQ might be of help:

FAQ: The Many Ways of Detecting Presence