There's a fun prallel to reality here. Designated examiners are known to spring surprises on you.
It doesn't matter if it's just private pilot checkride...if there's a piece of equipment in that airplane.. you had BETTER know how to use it ..
On this note.. if interest ever re-stirs in my Sim Flight Training .. the complex lessons will be in the (my) Cardinal. There's no need to be proving your competance with landing gear and constant speed props in a twin engined airplane..

Complex and high-performance are endorsements.. not ratings

I can't imagine anyone learning that stuff in a twin..