I’ve recently bought a 2010 v6 Camaro Rs and it’s throwing off evap codes. I was wondering what this issue is and if anybody has take the charcoal canister out without having to drop the whole rear end to get to it. Along with that I’m having misfires on every single cylinder, could that be due to the bad air fuel mixture caused by the evap?

 

Your evap no flow purge issue is likely a bad/stuck purge valve, or a circuitry problem. And no, that's not what's causing your misfires.
You have a fuel pressure problem, fix that before addressing the bank 1 upstream and downstream oxygen sensor codes.
Improper fuel pressure could be affecting the air/fuel readings at the upstream O2 sensor, and a malfunctioning upstream sensor will/can confuse the downstream (post-cat) sensor.