@microwork I also have the Freematics Emulator and a P1. I was able to see CAN data from the Freematics Emulator only when I connected an OBDLink EX diagnostic cable in parallel with the P1 (using an OBD3way) and was actively scanning with the OBDLink EX using its OBDWiz software.
I discovered that the Freematics Emulator generates CAN messages only in response to requests (such as from a scan tool), and not periodically on its own.