How to ruduce STM32WB55 BLE power and change connection parameters?

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Hello,

I used STM32WB55 HEARTRATE engineering test, and now the power consumption is at least 2.3mA. Is this normal?Is it possible to further reduce the power consumption by modifying the connection parameters?

I tried to configure it with the aci_l2cap_connection_parameter_update_req function, but the tests found no change in power consumption.I didn't use it, did I?Besides modifying the connection parameters, is there any other way to reduce the power consumption?

Thank you!