Where Are My Faucet Bonus Rewards?

Bonus rewards are often paid in the same UTXO as the daily reward for that date.

Check the dates on the Faucet under Claim History for the TXID for the Daily Reward.
Check the dates on the Faucet under Bonus Round history. If the same TXID appears on both pages, that means that both rewards were send on a single UTXO represented by that TXID.

This is in Sphere By Horizen. See Figure 1.

You can also inspect a transaction in the block explorer. Click on the deposit. That will take to "Deposit Details". You can inspect the TXID on the Horizen Block Explorer web page/. You may need to click the “Show more” button to reveal all addresses in the transaction, and find your address.