Then the 'Swipe actions' option will appear to open a new customizable interface. Users can set Swipe Actions either to the left or right, with the function not only archive or delete.
Gmail on Android devices that have been updated will be able to snooze, move to, mark and other Gmail functions through a swipe to the left and right.
If you can not enjoy it yet, be patient. Google releases its availability incrementally until it's available to all users.