Substrate operates differently from other blockchain platforms, and it may not be immediately clear how to track your balance increases from staking rewards. One way to do this is by using a Block Explorer like https://edgeware.Subscan.io, which allows you to view your full balance. Simply enter your reward-destination account address (whether it's your stash or another account) and monitor the balance over a day to ensure that it is increasing. This will help you keep track of your staking rewards and ensure that you are earning the expected amount.