the coyote continues to bite... resolved! :)

[toadster]

Would you be able to hear an exhaust leak. If one exist upstream of the O2 sensor it can corrupt the reading.

will double check the bolts, may have worked loose

OK, so not the engine harness nor PCM as they have been replaced. One can suggest the problem has to be from the PCM on to isolate the one bank.
So to me, stop looking at the electrical. I would plug the fuel rail and check for obstructions. Next I would pull the intake and check for obstructions and operation of the CMCV vanes.
You only need spark, air, and fuel. I think you have spark covered. Time to confirm air and fuel are getting to the cylinders on the offending bank.

what still has me on the electrical path is that bank two is running fully lean, according to the logs, even though we’ve replaced the transmission harness which has the O2 sensors built-in. We’ve tested both sets and I’ve swapped out the O2 sensor as well. Think the log wouldn’t lie showing that it’s always pegged lean on B2