Hi and welcome to the Community!!
Just to clarify for you, you only need to specify the actions in a slice if you want to LIMIT which actions are available to that particular Slice. This will save you from some messy action behavior expressions that control when an action is shown.
However, If you want ALL actions for that data table to also be available to the particular Slice, then simply set the first Slice action entry to “auto” and delete the rest of the entries. From then on, any new actions created will be made automatically available to the slice as well. This can save you time of having to update each of the slices (some apps can have many). It can also save you aggravation in trying to find out why an action doesn’t show up when you forget to update the slice to add the new action.
So to summarize, specifically list the actions when you need to prevent certain actions from showing for that slice. If you have no need to limit actions shown, then set the Slice actions to “auto”.