1. List devices: lsusb

2. Make note of bluetooth devices (example):
8088:0a2b Intel Corp. Bluetooth wireless interface
0bdb:a750 Realtek Semiconductor Corp. Bluetooth 6.0 Radio

3. Create rule: sudo vim /etc/udev/rules.d/81-bluetooth-hci.rules
Add the following line, replacing 0a2b and 8088 with the Vendor ID and Product ID you identified:
SUBSYSTEM=="usb", ATTRS{idVendor}=="0a2b", ATTRS{idProduct}=="8088", ATTR{authorized}="0"

4. Reboot: sudo reboot now