samples/bluetooth/peripheral_iso/prj.conf

CONFIG_BT=y
CONFIG_LOG=y
CONFIG_BT_DEVICE_NAME="Zephyr ISO server"
CONFIG_BT_ISO_PERIPHERAL=y
CONFIG_BT_SMP=y

CONFIG_BT_KEYS_OVERWRITE_OLDEST=y
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y