1. From 5.54 To BlueZ-5.65 updateについて
1-1. RaspberryPi4 : OS
cat /etc/os-release
 #output
PRETTY_NAME="Raspbian GNU/Linux 11 (bullseye)"
NAME="Raspbian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
1-2. Versionの確認

bluetoothctl -v

以上