If a finished chore did not add to a balance, check these in order.
Only members with Earn Rewards on earn anything, and their balance shows as zero while it is off. You may see "Earn Rewards is off for this profile" on their rewards screen, or "No one will earn this reward" when editing the chore.
Edit the chore and check the Reward Amount (allowance homes) or Points (points homes). If you recently changed the Reward Type, chores need a reward set in the new type. If the Reward Type is None, chores do not earn rewards. See How to choose allowance or points.
The reward is added only when every task is checked off. If the chore needs a photo, the photo must be added too. If a task was unchecked or flagged as incomplete, the reward is taken back.
With a Weekly Reward Accrual, the amount you entered is for the whole week. Each completion earns a share of it, so one day of a daily chore earns a seventh of it. In Recent Activity, these entries show how much of the weekly amount was earned.
Settling a balance sets it back to zero. On the person's rewards screen, tap the balance card to see the Settlement History.
See also How to track and pay out rewards.