SLC 2 display to AFR

I see in the current manual that bridging P2(7) to ground will change the display from Lambda to AFR. Is this feature enabled on all black pcb SLC 2s, or only from a certain production date? (mine was purchased earlier '23)

Cheers

Only unit purchased in the last 2-3 months has that feature.

Is it possible a firmware patch will be made available to update older versions? If that’s even feasible. Thanks.