You can view your staking rewards on the block explorers Subscan or Polkascan

Subscan

To see your staking rewards on Subscan, enter your address in the Search field, and then navigate to "Reward&Slash". This will bring up a list of all your incoming staking rewards. 



Polkascan

On Polkascan, you will find your staking rewards under “Balance transfers” as part of your other incoming and outgoing transactions:


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