In addition to what Gerrie said, laptops often have a hard life and it’s quite possible that the Bluetooth antenna inside your laptop is broken, hence the short range.
Gerrie’s advice is spot-on as usual. If you’re wanting to use any other BT devices and have this same range problem, then you could disable the on-board BT and use a BT dongle.
You do not say whether Windows or iOS but from my experience BT in Windows is horrific. Ant+ has been much more stable and is my wireless protocol of choice.