Lezyne Mega XL and dual-sided power meter compatibility

I recently picked up Lezyne Mega XL, mainly due to the fact that it supports left/right power measurement (as well as multiple bike profiles, a must-have for me). I have been using the Polar V650 along with Polar Look Keo Power pedals for a few years. It's been working well, and I like having separate left and right power readings, but I wanted the navigation features of the Lezyne.

My power pedals transmit via BLE, and I know that the Lezyne supports BLE connectivity. However, it can only accept ONE power meter signal, and from what I can tell, my pedals each transmit their own power reading to the headunit.

Look offers an option to upgrade older Polar power pedals to the newer version with ANT+/BLE. However, I am not sure if it will still transmit TWO separate power signals, or if one side transmits to the other, which then sends one signal to the headunit.

So my question: Has anyone used a Lezyne GPS with a true dual-sided power meter? How does it work? Does it send one power signal? How does the Lezyne present a L/R power balance, without having two separate power signals? I see that the Favero Assioma and Powertap P1 are both on Lezyne's list of supported power meters, and they are pedal-based meters that offer distinct L/R readings, so it must have a way of knowing how much is coming from each side.