v1.8.0 is expected to be released end of August (due to the Holiday season) and v1.9.0 likely mid of September.
The FP1 is a niche product, which has it difficulties (as experienced on multiple platforms).
The FP2 is the evolution of the presence sensor that is released on broader scale. So I don’t expect that the FP1 will be added to the app.
No. The device temperature is reported in a different way; reporting-frequency and -threshold, only reported in whole degrees and accuracy is less compared to the temperature sensors. At other platforms (incl. Zigbee2MQTT) this is already leading to a lot of questions.
For the targeted Homey community, this would lead to too many questions / complaints, e.g. that this sensor is not able to send updates every 0.1 degrees C…