I believe the code specifies that arcing devices like switches, outlets, breakers, motors, etc. must be at least 36" from the regulator valve vent. So first, a wall charger is most likely to be considered a benign fixture. And second, the measurement would be taken from that big disc on the far left, not from the meter itself.
So, yeah, if you can just try to refrain from using a blowtorch while charging whenever you smell a massive gas leak, you'll be fine.