Honestly, most bluetooth devices have a clear range of about 35 feet. Once you start putting walls and objects in the way - that can decrease sharply. So - you're good to leave your phone on the window sill at the gym and roam around for 30-35 feet or so, but in your home you may find it less. BTW - these use Bluetooth 5.0.
https://www.howtogeek.com/343718/whats-different-in-bluetooth-5.0/