Sometimes I’ll cook a normal traditional rack and use the second rack like this. Once it’s about 80% done wrap tightly in foil and cook the bejeezus out of it until you can slide the bones out like pulling floss through jello. Chop the meat. Anything you can do with hamburger you can do with chopped rib meat. I have a friend that does this guessing almost every cook. Sandwiches, Mexican,
Another thing Ill do is cook normally and slice and freeze. Take out a few and 8 minutes in the instant pot, then grill on one of my mini cookers. 3-4 ribs couple ABTS makes a good meal. I’ve not had much luck thawing cooked frozen in microwave. Some use Sous Vide
As for refreezing frozen from thawed, I don’t do that but bet it’s been done for me from processors to point of sale more than once.