How can I edit workout time on Apple Health app on iPhone?

I've entered too much time on my workout in Apple health. How can I edit it?

I’ve seen this question and asked in April of last year. The only answer said this……

You can't edit it. However, you can delete it and then manually add the correct information.

To add a workout, go to Health> Workouts and tap "Add Data" in the upper right corner. To delete a workout, go to Health>Workouts>Show All Data and tap

"Edit" in the upper right corner. Delete the incorrect data.

my only problem is the edit button in the upper right hand corner is missing. I’ve added the new work out, but I cannot delete the old one.