When I do a pre-saved swim workout on my Fenix 6 I get two more screen after the normal swim pool screens.
These two new screens seems not editable or I can't find how to edit them.
Has anyone noticed my own thing?
You can add a custom data screen, or select one of the predefined data screens.
Those screens cannot be edited, they are specific to when doing a preset workout and all activities have some form of them when doing a preset workout. I actually find them very useful since they show how much distance is left in a step or how much time is left in a rest. If you don't want to use them though your regular data screens are still available.
Garmin, I really miss this, when on a workout, can't edit the screen
I miss it, too. They'll bring it back whenever they fix whatever the issue is with in-activity datafield editing. Sometimes, especially when doing a new activity I haven't done before, I realize that I'm missing a critical piece of information, but I can't add it to my screen unless I stop the activity and start it over again. I really liked being able to do it on the fly.