Ours being a PHEV the SOC needs to be below 80% before the energy regeneration engages, once the SOC is below 50% the regeneration is more efficient. In standard D mode it is set at B2, you can manually adjust it use the paddle shift to B0 or up to B5. On a PHEV which ever B mode you use it just adjust the throttle position, not sure if it the same on an EV.
We just leave our in B5 it saves me using the brakes, I have now got it down to an art, previously the missus was complaining I was stopping a bit short.
I have to admit I am guilty of being obsessed with energy recovery.
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.