I could do it!...
The solution is to pause the training (go to Garmin Coach - then the three dots on the top right, choose "Pause"). Then resume it immediately and the missed training was there!... Hope…
I believe, you do not need to reschedule missed workouts of a coach plan. Simply pause or reschedule the future workouts, and start the missed workout directly on the watch:
Didn't work for me. Once it is marked skipped on the plan and your watch is synced, I can't move it on the calendar and I can't select it from the workplace. Also the work out plan progresses…
Nothing proposed here worked for me. Also changing the Date of the devices did not work (could select reschedule but got an error afterwads).
What worked was to enable alle days and then moving the long rund day into the next week.
A work-around is to recreate the workout in “training and planning”. It lets you create running workouts with warmup, run, and cool down. Go to the three dots at the bottom of the screen and select training and planning. Select workouts then create a workout. I missed a steady state run and recreated it the next day using that feature. That way you stay on track.