2016 l83/8l90
Deleted cats, DOD/VTT, rear O2s.

Swapped into JK

I keep getting the same P0206 and P0208 codes. Not sure where to go from here outside of a bad ECU.
Searching, I've swapped coils/plugs/wires. Replaced injectors. Injector harness. Tested main harness to X3 plug to make sure the wires werent broke.

From the check list, I'm guessing it's the ECU but cant figure out how to test it, but I'm curious to if it may be the tune. Anyone able to read it if I posted the tune?

outside of the couple deletes, the engine is stock