Which presence are you specifically referring to? The “use this device’s location” that you set in the app? Or some other integration?
Lots of integrations that people used to use for presence, including IFTTT and Life360, broke this week when they turned off the smartthings hosting cloud. Some will be coming back, some won’t, up to each service if they choose to rewrite the integration for the new architecture. But none of that should affect just the basic “ use this devices location” functionality.
Here are the details on the cloud shutting down:
Why Did My Integration/SmartApp Stop Working in January 2023?