Once the OData service is available, you can generate and develop an SAP Fiori app using SAP Business Application Studio as a development environment. SAP Business Application Studio is available on SAP Business Technology Platform. You can launch it from your SAP BTP trial account.
Watch the following video to get an overview of SAP Business Application Studio.
As an alternative to the cloud-based SAP Business Application Studio, you can use Visual Studio Code (VS Code) that has to be downloaded.
You can download it from https://code.visualstudio.com/.

You will use SAP Business Application Studio for the upcoming exercises.