No retirement award?

Sometimes it happens. Perhaps lost or never submitted due to laziness. I have run across it a few times and fixed it when I found it. It would be a rare thing for a soldier to not justify retirement recognition. Just my opinion.

More then likely you have gotten everything you will from your old unit. Our local process is for the command to submit the award for retiring soldiers at least six months out from their end of service date. Doing all the paperwork that early allows for the award to be presented during the SM last BA. But, I have seen it take two years for an award to get processed. I would suggest you reach out to your old unit's 1SG or SGM and see what you come up with.

Very common. In active and reserve components a PCS or retirement award can get hung up at any level from recommender to approver.
All of these problems start from the recommender not submitting six months out for presentation prior to departure:
Your recommender might have never finished it or never submitted it.
It might have been returned for corrections and forgotten.
It might have been lost at BDE level pending review.
It might have been approved and never sent back.
It might have been approved and sent back to someone at the unit who got there after you left and they don't have your contact information.
Contact your last unit, AND contact the BDE S1 for that unit.