When adding Ricoh Pro C7200x to printer destinations, there is no option to select a Hold queue.
It selects a Print queue with no option to change it to anything else.
The Hold queue is published and works just fine, I checked it in Fiery CommandWorkstation settings.
There is an option "Use LPR" which allows to type in the queue name manually, and then submission to Hold queue works.
However, this option does not transfer any variables or settings like Print Quantity or Sides Imaged.
Instead all jobs submitted this way just use whatever defaults were set in Fiery CommandWorkstation.
So this option is even worse as a result.
Is the Fiery JDF enabled? See below. I can't think any other reason for the behavior you are seeing.