Generally, you only provide a confirmation step if the result of continuing is: undoable, or requires effort (time/resources) to undo.
Asking for confirmation has two big downsides - it interrupts user flows and brings great risk of habitually clicking yes to confirm. This is why it should be reserved for actions that require careful attention. Don't ask for confirmation on routine tasks.
You mentioned reviewing a task does not delete the task if a user doesn't complete the process. This means it's not a critical action and you should therefore stay away from confirmations. You'll only train users to click 'yes' as fast as possible to continue their flow. Therefore, once users will at some point want to do something more impactful - such as deleting - that habit of clicking yes will harm them.
Instead of adding a confirmation, consider other ways to make users aware of risk:
- Separate truly dangerous actions (deleting) from the safe ones (adding/reviewing) with white space and color differentiation. Essentially, make sure it's not possible to misclick by accident with ample spacing.
- Reviewing (I guess editing?) can be followed up with a preview confirmation once a user wants to submit changes. Especially if it takes time to undo the action. This way a user can see the changes that will be made and snap them out of that habit to click 'yes' as soon as a pop-up shows up. It's a bit of a failsafe in a sense.
More here about the use of confirmation screens.