I just got home. I powered down the new iPhone 13 and powered up the older iPhone 12. It sees the watch just fine. The plan is to wipe out the 13 and redo the migration. However, my two days of riding 63 miles on Saturday and 75 miles on Sunday are showing up on the watch (since I wore it when I rode), but they're not showing up on the phone. The biking app - Wahoo, actually synced up with the old phone and I see the workouts. But Saturday and today are blank in fitness app.
Is there a way to "force" a sync between the watch and it's partner phone if the phone and watch were separated for two days so my 1605 day streak isn't broken? Definitely a first world problem, but I've been keeping this going for more than 4 years. Thanks!!!