When you stake KLV you have to manually claim your earnings. You can claim your earnings every 60 minutes. However, you can accumulate the earnings as long as you want.
This tutorial shows the steps to claim your KLV earnings. Note that, you can claim your earnings from DVK and KFI staking in similar steps.
You can claim your KLV earnings inside Klever Wallet as follows:
Tap on KLV token from your Portfolio screen, then switch to the target Account.
Inside the KLV Account, tap on STAKING icon.
Inside the staking screen, tap on the Claim button.
Tap on Confirm button to approve the claim.
Enter your PIN code to sign the transaction.
NOTE: To claim your KLV earnings, the smart contract consumes up to 50,000 Energy. If your wallet does not contain enough Energy then up to 20 TRX might get burnt to generate the required Energy.