Daikin H Hybrid COP - Does flow sensor work in ESPAltherma hybrid?

[githomeGL19]

I have a Daikin H Hybrid. The flow sensor shows "0" litres flow on 18 | 0x62,9,105,2 | Flow sensor (l/min).
There must be a flow sensor in the outdoor unit somewhere, or it would not work.
Just cant seem to get any output from ESP Altherma on that sensor, when all other sensors are running fine.
Objective is to calculate COP, but cant do that without flow rate.
Has anyone else managed to calculate COP on a Daikin Hybrid H unit I wonder?
I have put a TUYA monitor on the incoming electric supply to the whole heat pump and boiler, which then monitors real full electric usage including the water pump which is housed in the boiler and the boiler electric consumption with 3 way cylinder valve, so I'm getting true consumption, but am stuck with getting the COP as need flow rate for this.
Any help appreciated.