I had the same issue for me and my wife.
I was able to get all of my awards back, including limited edition awards.
I rebooted both both the iPhone and the watch and waited, while connected to power. Checked about 5 minutes later and everything was there. I think after setting up a new device, pairing the watch, and restoring from backup, there is still a lot of information that needs to be downloaded and synced from iCloud.
For my wife, we are still trying different ways to get them back. She is missing all awards, unfortunately.
Update: all awards came back, including limited edition awards. Looks like it just needed some extra time to sync with iCloud.