This will audit all of the web App Builder Applications in an organization, and provide a list of the widgets within them. The list will be in a csv file. You can then cross reference the list of widgets with the following blog, in order to prioritize the order with which you migrate your Web App Builder Applications to Experience Builder. https://community.esri.com/t5/arcgis-experience-builder-documents/functionality-matrix-for-web-appbuilder-and/ta-p/1113766

Providing user-friendly interfaces in your applications is crucial for increasing task completion and user satisfaction. This can be particularly important for geospatial applications, as these may include a high degree of complexity or may be used by the public or non-GIS professionals. This workshop will introduce you to ArcGIS Experience Builder, a new development platform from Esri that allows you to build custom Web apps for desktop and mobile devices using a drag-and-drop interface. You will learn how to develop an app using Experience Builder’s layout and widget options, as well as some best practices for integrating Experience Builder into a larger user-interface design process and optimizing your app’s interface for greater usability.