my name is Fabian - I am new to the whole topic with Victron and VenusOS / GX devices.
But I created a small script/module for the devices to connect Shelly 3EM smart meter.
You can find all details on GitHub: https://github.com/fabian-lauer/dbus-shelly-3em-smartmeter
Hope that this is helpful for someone out there.
I would be very happy to get some feedback and input how to improve.