But you need a gateway/installments processor system to work, like Klarna , Afterpay, Square, Four, Splitit, Affirm, Sezzle, QuadPay and others. The Parcelamento - Installments app works with all of them if you don't charge interest.
The Parcelamento - Installments app helps to show that info, that you accept installments and the price divided at your store. Making the products more accessible to your customers and helping to increase the average order value of your sales.
But you still need a service who will process the Installments, like the ones I mentioned above.