It is expected for Dashboard widgets appearing in Workstation should also appear and remain functional in the new WebView.
Why are some widgets showing in Workstation missing in WebView?
Until 9.6,, all of the following widgets appear in WebView with just a frame and text stating: 'Unsupported Dashboard Widget Type'.
Application Triage Map,
and Text Viewer.
In 9.7 String and Text viewers are supported and the remaining viewers are not supported and there is no plan to support them in future as of now.