RUCs or any Platinum choice benefits are not given until you achieve the actual PM qualification of 75K MQMs and MQDs, if applicable. This is listed in the challenge T&Cs.

I have cleared into domestic D1 once before not at the gate - and it was JFK-LAS on a Tuesday.

Never ever happens on JFK-LAX even for a Diamond, let alone on as busy a travel day as Thursday.