You can but it doesn’t come for free.
Essentially what you will do is create a proxy for Phone by , let’s call it PhoneBT_Proxy. Then create a rule that only changes the proxy when PhoneBT remains in the same state for a certain amount of time. It looks like you can do something as short as 1 second so to do this your cost will be a one second delay between actual changes in states (for example, it will flip the proxy item one second after you actually come home and the phone is detected).
To do this create a rule triggered by changes in PhoneBT. If there is already a timer cancel it. Create a timer for one second. In the body of the timer update the proxy item to match the state of the sensor item.
This is called debouncing.
I recommend considering using Expire Based Timers as they are simpler to work with than Timers.