The default is the maximum power.
Did you connect an antenna to the wifi/bt port?
BLE power is set in the rs9113 driver in /etc/default/rs9113:
# Power selection
# 0×00 – For Both TX and RX High Power
# 0×11 – For Both TX and RX Medium Power
# 0×22 – For Both TX and RX LOW Power
# 0×10 – For High Power TX and Medium RX Power
# 0×20 – For High Power TX and LOW RX Power
# 0×01 – For Medium TX and RX High Power
# 0×21 – For Medium Power TX and LOW RX Power
# 0×02 – For Low Power TX and RX High Power
# 0×12 – For LOW Power TX and Medium RX Power
WLAN_RF_PWR_MODE=0×00
BT_RF_PWR_MODE=0×00
#Power_mode type
# 0 – HIGH POWER MODE
# 1 – MEDIUM POWER MODE
# 2 – LOW POWER MODE
BT_RF_TX_POWER_MODE=0
BT_RF_RX_POWER_MODE=0
It is set to the highest power by default.
These same variables apply simultaneously to BLE and standard Bluetooth.
If these values are changed, it is necessary to reload the driver:
/etc/init.d/rs9113 stop
/etc/init.d/rs9113 start
If you are using bluetoothd, it will need to be restarted as well.
/etc/init.d/bluetooth stop
/etc/init.d/bluetooth start
Likewise if you are using wpa_supplicant, or hostapd, in one of the modes that also supports wifi, these will need to be restarted.