You don't seem to have a tracked Switch profile added at the moment?
What I said only applies if you edit the time on a tracked game. But currently, none of the Switch games listed on your profile are tracked, as those were added manually.
So no need to reset hours on manually added games. When you add your Switch profile, the tracked games will appear as separate entries. And it should pick up all hours played previously (not just from the time of linking of your profile) unless your activity log was reset at some point on the Switch itself.