Nope, you can't.

I hear ya. I have about $1800 in Delta credit just waiting to be used and expires at end of 2023.

The good news: The VA soft product right now is above Delta's current. Delta switched catering on their international flights during COVID to a much cheaper company and the food is just god awful. Disgusting really. I've contacted the Diamond desk and they said Delta plans to switch to a new vendor once their COVID contract ends...

We flew VA in June to London for Jubilee and the food is same quality as pre-COVID now. They quantity is a tad smaller but otherwise it's good quality.