When you look up the payment of interest from the payment list as described in How to find a specific payment in Adyen Essentials, you can view the latest status of the payment under the "History" tab.
The status "settled", "settledBulk", or "SettleScheduled" indicate that the funds have been booked to your Adyen balance.
In the payment overview, the "Settlement Batch" indicates in which payout the transaction was included.