I have not encountered this yet and I can’t locate the answer in any literature I have, so here it is: is it a safety concern to double tap off the meter?
A house I inspected has two panels. The configuration of both of them is goofy to begin with, but then I realized they are both fed directly from the meter.
No pics? Is it a 400 amp service? Perfectly fine to take off from the meter with two sets of feeders, so long as the meter has two sets of load side lugs lugs. It is a common setup for 400 amp services.