I think there are a few of us waiting on MY22 V6 GCL Summit Reserves. I have found a dealer stock MY22 V6 SR, but they are very rare right now.
I have no idea what the hold up is... They're building lots of V6s of lower trims, and and as far as I know the interiors are identical in the V8. I can only speculate as to what the reason would be, but it doesn't help us.
Best I can say is, it will come. Let us know when you get to D1 though. I suspect the lot of us with the V6 will probably be built around the same time. I am not expecting mine until March though.