Hey Terry,
You have a couple of options to get data out of your Daikin heatpump. This forum is provided by an organization that sells energy monitoring tools, one such device is their Heat Pump Monitoring kit. This includes calibrated Heat and Electricity meters that would need to be fitted inline with your heat-pump plumbing and your electricity feed to your heat-pump, so not a DIY job. Though the data that you’d get for your system would be MID certified (i.e. highly accurate) and is what a lot of people on this forum are feeding in to heatpumpmonitor.org to enable systems to be compared to one another and feed the data in to emoncms for scrutiny (you can filter the list at heatpumpmonitor.org to “Daikin” and then find similar systems to yours for example).
Alternatively, and a bit more DIY friendly, is a project called ESPAltherma which involves connecting a small ESP32 device directly to your heat-pump and reading out the raw data created at the heat-pump, see the linked thread for more details.
The data that ESPAltherma is reading is the same data used by the MMI to present rounded and (badly) aggregated information to the end-user. This data is not accurate in the same way as the OEM monitoring kit (and so in my opinion, shouldn’t be used for posting data to heatpumpmonitor.org as the system cannot be reliably compared with a MID certified monitored system). However, it is useful for giving you insight in to how your individual system is performing at any given moment and giving you the ability to compare your system to itself (e.g. to see how particular configuration changes have impacted performance).
You’d then want to pair this with something like a Shelly Energy Monitor attached to your heat-pump electricity feed to get an insight in to the power being drawn by the heat-pump. With this information you can then populate emoncms and start usign the Heat Pump app and get data similar to what you see on heatpumpmonitor.org.